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 martial arts legend Bruce Lee kicking a guy in the head while the text "How about.... NO!" flashes up on the screen. Not entirely sure what movie this particular scene is from.