Watch: Dancing dinosaurs invade Oakland Coliseum

Who knew dinosaurs could dance, pose for pictures, and terrorize a child all in one night?

Four T-Rex's were spotted at the Oakland Athletics game on Tuesday, where they had some fun with a number of people, despite one younger fan getting a little frightened.

It takes true dedication to pull this off, but these four were able to do it.

(Video courtesy: MLB.com)