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.
A reaction gif of jazz instructor Terence Fletcher shouting "Not my f*cking tempo!" This is from the movie Whiplash (2014). The character was portrayed by actor J. K. Simmons (previously played Vernon Schillinger on the TV show OZ and Dr. Emil Skoda on Law and Order).