What Causes Hyperventilation Anime Characters To Faint?

My adopted younger sister, Marissa Payton, loves pulling pranks on others. But I'm the only one who gets hurt in her pranks. Last year, she and our older brother, James Payton, locked me up in a cold storage room. Because of that, I'm afflicted with a case of severe asthma. James apologizes to me before telling me that he'll take me cave diving just to make it up to me. Marissa tags along with us on the trip. She keeps casting me malicious glances every now and then. Feeling rather uneasy, I quickly get into the water just so I can get away from Marissa. But when I'm 65 feet deep, I feel a wave of suffocation hitting me all of a sudden. It turns out that Marissa has secretly shut off the oxygen supply. I can hear Marissa's smug laughter ringing out from the underwater communicator. "Look, Jamie! I told you that Nat would fall for it again!" James' voice is filled with affection. "Leave it to you to be smart enough to think of such a prank to play on your sister, you little imp." My face has gone blue from the suffocation. I struggle with all my might in an attempt to turn on the bailout cylinder, only to feel my hands getting slapped away from them thanks to Marissa, who has swum over to me. She then whines into the communicator, "Look at how dramatic Nat is being, Jamie! She can't stand the suffocation at all even though it's only been a few seconds!" I hear James' icy and aloof voice reverberating in my earpiece. "Just hold on a little longer. Look at how delicate you are! It hasn't been all that long, yet you already can't stand it. How humiliating. You're not even in the same league as Mari!" This time, I can only stare at James in despair as my complexion slowly goes purple. Has he forgotten what happened to me? Thanks to their prank, my lungs have already sustained irreversible damage. It's getting more and more difficult for me to breathe. Finally, my vision goes black, and I collapse in the dark bottom of the sea. This prank isn't funny at all, James. This time, I'm going to die for real.

The Ivanovas and the Vitales are well-known aristocratic families who have maintained everlasting friendship through generations. My name is Anastasia Ivanova. I have been the daughter of the Ivanovas for twenty years, only to discover just now that I was switched at birth. When I was swept out of the Ivanova’s mansion like rubbish, Lorenzo, the youngest son of the Vitale family, firmly picked me up in spite of all objections. Lorenzo always acted cold and distant toward me. I didn’t know why he came to take me into his car at that time. He whispered in my ear again and again, ‌"I’ve wanted you for a long time."‌ He pinned me against the leather seat, making me cry until my voice was hoarse. At that moment, I finally understood his coldness over the years was not indifference but restraint. Soon after, Lorenzo overrode all objections to marry me. His parents were vehemently against me, but Lorenzo directly stripped them of power and became the youngest godfather. Scarlett Montgomery tried to stop us from getting married, but Lorenzo canceled all her credit cards and threatened to send her away. I thought we would have a happy life. Three days before our wedding ceremony, he planned to send me abroad, claiming enemies might retaliate. But, I accidentally overheard him talking to Scarlett in the hallway at night. "Thank goodness. You tricked her into leaving until after I give birth. You’re so good to me!"‌ He kissed her cheek, ‌"I don’t want Anastasia know our affair. You must keep it secret."‌ Their dialogue made me devastated. But I didn’t confront him immediately. Instead, I quietly completed my immigration paperwork as a way to make a clean break with him.

After my fiance’s childhood friend found out I was born with a heart condition, she secretly poured a high-dose energy drink into my champagne. The moment I drank it, my heart started racing, and stabbing pain spread through my chest. In a panic, I tore open my only emergency medication, but the water I used to take it had been swapped with strong lemon water. As soon as I drank it, my face went pale. I lost all strength and collapsed to the ground. “Lemon water’s full of vitamin C. It helps with hangovers and keeps you healthy.” Charlotte Whitmore laughed so hard she nearly doubled over. With her arms crossed, she looked at my fiance, Ethan Cross, the boss of the Rolling Stones. “Ethan, your fiancee’s acting is incredible! “I’ve been a doctor for years, and I’ve never seen anyone react like this to a little champagne and lemon water.” I bit my lip until I tasted blood. The pain made my eyes sting, and I clutched Ethan’s leg. “Honey, please, call an ambulance! I can’t take it anymore…” For a moment, his expression wavered, but the guests quickly cut in. “Come on, stop pretending! Nobody dies from a bit of champagne and lemon water.” “Yeah, you’re just jealous Charlotte got promoted and didn’t want to toast to her.” Ethan’s face turned cold again. He yanked my hand off and stepped away. “Charlotte’s a doctor. You’ll be fine with her here.” I stopped begging and texted my father asking for help.

To avoid any suspicion of favoritism, my father, Myron Bradshaw, forces me to participate in the group blood donation. The only problem is I'm severely anemic. When the nurse, Lorna Ritter, draws 100 milliliters, my vision suddenly goes dark. I've just put my hand on the needle tube, about to call for a stop, when Ms. Ritter holds my wrist down. "You're calling it quits after only 100 milliliters? All the other students are donating 400 milliliters." She glances at my bloodless face, her eyes full of disgust. "Donating blood is such an honorable thing to do. Selfish fakers like you who pretend to be sick really deserve to be penalized with a double draw." Beside me, Dad looks at me coldly and says with disappointment, "Ronnie Bradshaw, is this how I raised you? Everyone else has donated, so don't think you can be an exception. You'll draw 400 milliliters of blood today even if it kills you." I gasp for air, my heart racing so fast it feels like it's about to burst. By the third tube, my vision blurs completely, and I collapse heavily to the ground. My soul slowly rises into the air as I gaze at Dad guiltily. I'm sorry, Dad, I'm really not lying. This time, I truly can't hold on any longer.

I become a firefighter after getting abandoned by my ex-wife, who's a domestic abuser. At first, I think my fiancee, the heroic Captain Cassadee Flack, will be my salvation. But at the blazing scene, the warehouse explodes for the second time due to the scorching temperature. What makes things worse is that the oxygen in my tank will deplete soon. I reach out to Cassadee for help, only to witness her passing the last spare oxygen tank to Colin Halfpenny, the teammate standing next to her. "This is Colin's first time entering a blazing scene. He's terrified, whereas you have enough experience under your belt to deal with this situation. You should hang on for a while longer." I'm choking on so much thick smoke to the point that I almost suffocate from it. Angered, I point at the blinking red light on the control panel. "If I keep suffering from the lack of oxygen, my brain will eventually die! This is the standard procedure of a rescue mission!" Cassadee wears an impatient look. "Why are you being this petty? I promised Colin's dad, who sacrificed himself for me, that I'd take good care of Colin! Can't you be more empathetic? "I thought you could endure pain the best! Back then, you didn't even let out a groan when your ex-wife broke your rib! How is it possible that you can't endure such a small difficulty in this mission? "I finally understand what kind of person you actually are! Someone who's grown up in nothing but pain and misery is bound to be selfish!" I no longer utter a single word to Cassadee. Instead, I use all of my strength to press the emergency SOS button on my helmet. "Command center, please send help immediately. The on-site commander has demonstrated severe misjudgment in handling the situation. I request compulsory intervention."

I am a firefighter. A beam crashes onto me in the middle of a burning building. At the same time, my oxygen is about to run out. I writhe and struggle as much as I can to reach for my backup oxygen canister, only to feel my fingers brushing over a bottle of water instead. When I turn around, I see my wife, Leah Sawyer, giving the last backup oxygen canister to her new mentee, Roderick Wyndham. I begin calling out to her via a walkie-talkie. "Leah, I'm being pinned down right now, and my oxygen's running out! Where is the oxygen canister?" As Leah shields Roderick behind her, she replies impatiently, "I've already given it to Roderick. It's his first time inside a burning building, so he's frightened. Having an extra canister on him gives him a sense of security. "You're already a veteran firefighter, so you can just think up a way to resolve your situation. Don't go around wasting precious resources." I can feel thick smoke infiltrating my lungs at that moment. Feelings of asphyxiation soon overwhelm me. "My leg is broken, so I can't move at all! Without oxygen, I won't be able to hold out till I get rescued!" But Leah merely chortles in response. "Stop playing the pity card! Every time we're out on a mission, you're always the cowardly one who's terrified of dying! You have zero sense of dedication at all! I shouldn't have let you join the firefighting squad, to begin with! "What's the use of you clinging to the equipment? Giving it to the newbies is the best way of maximizing its value!" I can only smile bitterly in response. Using what's left of my strength, I switch to a public channel and begin reporting to the command center. "For the record, Captain Leah Sawyer deliberately tampered with the essential rescue equipment in order to protect Roderick Wyndham, causing me, a fellow firefighter, to be trapped in a deadly situation. "I hereby request the immediate activation of the Firefighter Emergency Evacuation Act. Also, I formally charge Leah with gross negligence and attempted homicide."