Jimi Heselden, owner of Segway, Inc., was killed when he drove his Segway off a cliff and he fell 213 feet into a river.
In 2006, a 26 year-old South Korean man died of exhaustion after playing a video game for 50 hours straight. He was at an internet café in Taegu where he’d spent the past two days plus playing StarCraft. The man had recently lost his job due to missing work to play the game.
A 44-year-old Montana man died while venturing out onto a highway at night in a camouflage suit and being hit by a car. He was wearing the suit in hopes of convincing people they had seen Bigfoot.
Sunandha Kumariratana was a princess in Thailand when she drowned while her servants watched. They could have helped, but they were forbidden to touch her.
Kenneth Pinyan died having sex with a horse. :(
28-year-old Jennifer Strange died during an attempt to win a Wii from a radio station in Sacramento. She was participating in a contest to drink the most water without urinating, and died of water intoxication.
In 2004 a Taiwanese woman was so worried about the SARS epidemic that she filled her bathtub with an alcohol mix that was 40% ethanol. She died of alcohol intoxication and a BAC of 1.25%.
Gary Hoy, a 38-year-old lawyer, was killed when he ran into a pane of glass in order to show how safe the windows were. The window pane stayed in tact but popped out of its frame, and he fell 24 floors to his death.
In 1985 a Canadian stuntman invented a specially cushioned barrel to survive long falls. He died in front of 35,000 people showcasing it when the barrel missed the water tank he intended to land in and instead crashed into the ground.
In 1999 a gym teacher in Liverpool died following injuries sustained when he went to pick up a Javelin, tripped, and fell into it. He was impaled through the eye.
Heidi Montag’s plastic surgeon, Frank Ryan, may have been tweeting pictures of his dog when he accidentally drove off a cliff.
30-year-old Navy Lieutenant George M. Prior died after golfing, because he carried the tees around in his mouth. He had an allergic reaction to the fungicide used on the course.
Tennessee Williams died while putting eyedrops in. He placed the cap in his mouth while he positioned himself and accidentally swallowed and choked on the lid. (Others believe he died from alcohol and drug overdose.)
In 1979 Nitaro Ito was vying for a seat in Japan’s House of Representatives. He tried to gain sympathy with voters by having someone punch him and then stabbing himself in the leg, he bled to death instead.
A 21-year-old tweeted “Drunk af going 120 drifting corners #FuckIt YOLO” before crashing his car—killing himself and four other people.
The guy that invented “no taxation without representation” prior to the Revolutionary War told his friends he wanted to die by being struck by lightning—and did. (Not sure if this is an embarrassing “be careful what you wish for” thing or just really badass.)
Geoffrey Haywood pretended to be blind to get attention. While walking with a white stick at night he fell into a ditch and drowned.
The first emperor of China died in 210 BCE after ingesting mercury pills he thought would make him immortal.
Daredevil Bobby Leach, the first man to go over Niagara Falls in a barrel, died after complications of slipping on an orange peel.
A man bet two women $4,300 that he could have sex for twelve hours. He won the bet, but died almost immediately—he’d downed an entire bottle of Viagra.
Kurt Godel, a gifted logician and mathematician, was so paranoid of being poisoned that he would only eat if his wife had cooked it for him. When she was hospitalized for something unrelated, he starved to death. 
