Browns safety Nick Sorensen was sprinting down the field after a kickoff when he was blocked simultaneously by Caleb Campbell and Andre Fluellen of the Lions on Saturday night. The hit sent him to his back and led to him being carted off the field and taken to a hospital. "It's horrible whenever you see somebody laying down on the field," Browns coach Eric Mangini said. "It's a reminder of how tough this game is, how things can change so dramatically." Cleveland said after the game that tests were negative.