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 a funny animated gif of a kid trying (but failing, badly) to kick a ball. The way the poor boy stumbles and falls over after he miss-kicks is hilarious. This is sometimes used as a reaction gif to convey failure.