I'm going to cry in a corner now.
Sorry, Homer. But what is wrong with authentic Italian pizza (in Italy, no less)?
A few years ago, 70 year old man either jumped or fell into a thermal pool in Yellowstone. It was so acidic that it dissolved everything except part of one foot and the shoe it was in. I've often wondered why that foot and shoe didn't dissolve.
I plan on dying someday, but I dearly hope I don't precipitate the event by doing something stupid.
Out of curiosity, I just googled "Are Yellowstone thermal pools dangerous?" and ... ack!

They absolutely are. Not just acidic, but extremely hot (easily reaching 200 F), and concealing bacteria and toxic chemicals. Jumping into them sounds like a colossally bad idea.
Perhaps this man may have fallen in, because of a medical condition. Regardless, that's one hell of a way to die.
Over here in Australia, some tourists* (especially in northern Queensland and the Northern Territory) insist on messing about with crocodiles**. I've seen news-stories about people swinging on ropes above crocodile-infested waters, or even boating or swimming (!!!) in the same waters.

Obviously, it rarely ends well ... because some people are morons. ;-P
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* Not just overseas tourists, but anyone from out-of-state. You will only find crocodiles in the northern parts of Australia.
** Crocodiles are NOT the same thing as alligators.

Also, freshwater crocs are usually fairly safe, but don't provoke or surprise them. Saltwater ones are a different story - they're huge (anywhere from 11 to 20+ feet in length), territorial, and VERY aggressive.