This is an animated gif of Alison Brie moving her hand over her face, which causes her facial expression to go from a smile to a serious face. In case you didn't know, Ms Brie plays Annie Edison in the popular show, Community.
Gif Central boasts hundreds of funny animated gifs and reaction 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.
