It's never fun to watch a QB get hit, and not get up. It's pretty scary to watch. This particular highlight is something I don't like to watch. Ouch does he take a hit. Concussions have ended many a good QB's career. Namely I can remember Steve Young's career being cut short by concussions.
"Tim Tebow, quarterback of top-ranked Florida, was released Sunday morning from a hospital in Lexington, Ky., roughly 12 hours after suffering a concussion during the third quarter of the Gators win over Kentucky. Florida Coach Urban Meyer spent the night in the hospital with Tebow and told reporters his quarterback was "doing fine."
Florida has a bye this week before playing at No. 4 Louisiana State on Oct. 10. Tebow's status for the game against the Tigers will not crystallize until later in the week. "
Source: Washington Post