This is an animated gif of a black actor on Star Trek going crazy / having a fit after watching something on his computer screen. My apologies; but I've never watched Star Trek before, so I'm unable to come up with the Actor/Character's name.
This gif has been around for a long time now. It is often used on forum boards whenever something extremely shocking has been posted (or if someone is being sarcastic and over-exaggerating how shocking something is).
If you have any idea who this black dude is, be sure to post the name of his character in the comments section below.