Originally Posted by gblowfish
Getting a clear video of this is the equivalent of the Chiefs Zapruder Film!
However, I think the Ravens video is VERY interesting.
The overhead view I saw on TV shows his head hitting the ground.
This video follows Charles, so you don't see the complete motion of Cassel going to the ground.
You do see Cassel's body go stiff even before his BUTT hits the ground. So whether his head hit or not is irrelevant at this point - he was somehow knocked out by the HIT.