The teen hospitalized after a 4-day video-game binge

Early Tuesday morning in Columbus, Ohio, 15-year-old Tyler Rigsby emerged from his bedroom after at least four straight days of playing Call of Duty: Modern Warfare, lured out by his mom with the promise of visiting his aunt's house. Once there, Rigsby collapsed three times, his face pale and lips blue. Emergency doctors at a local hospital treated him for severe dehydration and exhaustion, and his mom, Jessie Rawlins, promptly got rid of the Xbox. Rigsby isn't the first person to sacrifice his health thanks to video-game addiction, either. Here's a look at his story, and the bizarre tendency to game-till-you-drop:

Did Rigsby really play Modern Warfare for four days?

Four or five; his family isn't really sure. Rigsby did nap for a couple hours here and there during his marathon gaming session, and leave his room a few times — for snacks, bathroom breaks, and one quick shower — but otherwise was holed up with his Xbox. By the time he arrived at his aunt's house, "it's like he was looking at me but he wasn't there — it was like he was looking through me," the aunt, Jennifer Thompson, tells WCMH-TV. "We were talking and I heard a thump and I looked over and he just fell."

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What caused him to collapse?

Dehydration, most likely: When you expel more liquids than you drink in, your blood volume shrinks, lowering blood pressure, sometimes to the point where a lack of oxygen in your brain makes you pass out, says Dr. Mike Patrick, an emergency physician at Nationwide Children's Hospital. Severe dehydration can also cause brain swelling, seizures, kidney failure, coma, blood clots, and even death. Of course, it's possible Rigsby passed out because he had barely slept for four or five days, says Dr. Patrick. "After so long, [your neural system] stops firing and you just go to sleep whether you want to or not." This was the first time Rigsby had such an incident, Rawlins tells The Columbus Dispatch. "I never in a million years thought that a video game would involve his health."

Are such gaming-related mishaps unusual?

Not unusual enough. In some ways, Rigsby was lucky, says Michelle Castillo at CBS News. Other non-stop gamers who forgot to drink liquids have died. Asia seems especially prone to gaming fatalities: Last month, a Taiwanese 18-year-old died in an internet cafe after a nonstop 40-hour Diablo session, while a Chinese gamer died in February 2011 after playing for three days with little food or sleep. But the problem is global. In August 2011, 20-year-old British "Xbox addict" Chris Staniforth died after a blood clot traveled to his lung from his calf, a consequence of sitting for extended periods. And the gamers themselves aren't the only ones who get hurt: In 2010, a British mother was banned from the internet and given a two-year suspended sentence for neglecting her three kids and two dogs because she was so engrossed in the online game Small Worlds.

What lessons can we draw from Tyler's close call?

For one, says Dr. Patrick, those who insist on marathon gaming need to use some common sense: Remember to drink and eat enough, get up and move around every once in a while, and turn off the TV or computer and get some real sleep. We also have to look at Rigby's "mom's inability to intervene and end this persistent threat to the health of her child over the course of five days," says Owen Good at Kotaku. Five days! Getting rid of the Xbox is a good step, but I doubt it "totally solves all the problems in this household."

Sources: CBS News (2), Columbus Dispatch, Kotaku, Medical Daily, NineMSN, UPI, USA Today, WCMH