The two Russians who pulled the pin on a grenade and held on to it to take a selfie. Apparently the number of contenders for Darwin Awards is growing in Russia. The government has launched a new campaign entitled "Safe Selfies".
I found this on the Darin awards website. I'm choosing this one because the poor guy didn't die, thankfully, but managed to take himself out of the gene pool by becoming unable to reproduce.
Warning : not for the squeamish, or for any man, probably.