Well i'd have to say my most idiotic death was me jumping as far out as i could in Outer Wall.
The basic gist of why was because i remember hearing somewhere there was a fifth ending (It was called the fourth, but this was around the time Hayden Studios uploaded the Fourth ending video, and i also thought that was real. In fact, here's an old video of me where I'm confused why it isn't working: )
Basically instead of saying the usual "You were never seen again", it would talk about how The Doctor created an extremely shitey reality show, boring the residents of the island to death. It would then transition to a screen only saying "It is now safe to turn your computer off"