PANIC, AND FIND TEBOW.
During full-team drills against the Buccaneers, Tom Brady went down after an incomplete pass. It appears that a Bucs DE pushed left tackle Nate Solder into Brady, rolling up on his left leg. (It was surgery on his left knee that forced Brady to miss the 2008 season.)
Brady stayed down for a bit before returning to practice, but after a few more reps, consulted with the Patriots medical staff and walked off gingerly. GINGERLY!
The video was captured by fan Chad Kopcak. So thanks, Chad, for providing the image to go in your fellow fans' nightmares.
Update: EVERYBODY REDUCE YOUR PANICKING.