Gif Central boasts hundreds of funny animated gifs. Only the best of the best make it onto this site, with most of them having an accompanying source. No tumblr-esque one-second-long disappointments. No obscure titles or descriptions.
This is an animated gif of a Space Engineers game character shooting himself in the back of the head. Often used as a reaction gif to express that "KILL ME!" feeling you get whenever you do or remember something that is painfully cringe-worthy.