“If he had a rifle he would have dropped it to the ground and then jumped.”
That is what you or I would have done because it is common sense. But seriously, this guy jumped off with it still in his hand... It was a dumb move, he could have seriously hurt himself if he had landed on that barrel sticking up vertical.
How did he manage to grip the edge of the roof carrying a rifle. I have yet to see a rifle. He had to drop at least ten feet.