Cousins jokingly warns Pryor not to get too fast

New Washington Redskins wideout Terrelle Pryor is hard at work as much of the NFL world takes a well-earned vacation with training camps on the horizon.

Pryor posted this video to Twitter early Tuesday of him doing exercises aimed at increasing his speed.

The video prompted this response from Pyror's quarterback, Kirk Cousins:

Pryor ran the 40-yard dash at an unofficial time of around 4.40 seconds at his pro day in 2011, so he is plenty fast. He was a quarterback prospect back then, though, so it's possible he's even faster now that he can focus on speed training without worrying about passing drills.