Everyone will have different symptoms. i have had several concussions, my worst one ever, it took a couple of days for short term memory to return. i had headache for a day or 2, and was fine after - played the next week. tebow's head and neck are structured in a way that the injury won't be as severe as someone with smaller crainium and thinner neck. (that is not a shot at Shane), i am a big Shane fan- he is as tough as they come. he will also recover quicker. If i am wrong, i hope they hold him out, but i think he will be fine for LSU