A dude was caught on video swimming naked in a tank at the Toronto Aquarium, one with sharks visibly swimming around it. Not sure if he knew that before jumping in. Also not sure if the guy was drunk or high but it doesn't seem like a smart decision. He even taunts the aquarium staff, pretending like he's coming out then does a back dive.
The police were called, but apparently he had left before they arrived.
We can't post the videos here because there are clear shots of his penis and balls, so you'll have to use these links to watch.