Correct, shooter was inside a vehicle, not really in any danger from the victim who is on foot. I cannot see any valid argument for a stand your ground defense, put the car in drive and leave the seen, he wasn't the one with a gun.
No. Probably has something to do with reading the field, making decisions, setting protections, etc. Who knows though, could just be a bunch of meanies picking on Josh.
Could have. Probably expect your quarterback to know the ball has to go in the endzone. 11 seconds is 2 tries at it. Running out the fg team with 11 left would have been mocked relentlessly.