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 some dude laughing in front of a computer. After a second or two of laughing, he quickly stops and points at the screen. This would be a perfect reaction for whenever somebody delivers a great retort online.