We have seen someone playing Pokemon GO result in finding a dead body, but we haven't seen too many videos of people doing stupid things because they were playing the game. Finally, that has changed and without anyone getting injured (well, except for their pride).
Twitch streamer I_Play_Too_Much_Gragas (via Mashable) was walking around town at night playing Pokemon GO when it happened. It was dark, he wasn't paying attention and boom, a pond suddenly appeared underneath him. Rather, he walked into a lake while looking for a lure on a bridge – a mistake anyone could have made, except, only a streamer could make this mistake and catch it on camera.
It's unfortunate we didn't see it happen from another angle, but at least we heard it happen. It's a bit funny that his phone's background is a stream of water.