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 kid running towards the stairs before turning around and sliding down it. Typically used as a reaction gif whenever somebody wants to express how excited they were when the pizza man came etc.