The point was you don't need to have a great arm to be successful, not every great QB, or one that reached elite had a cannon arm...many did not. DD
They didn't really explain what happened on that PF to end the half... Cush was apparently head butted after the play when his helmet was already off.
Jacoby dropping balls was a problem his first two years. He still will occassionally have a bad drop when he looks upfield before catching the ball. He still rounds off a lot of routes, though.