It turns out you learn your physics from Mythbusters. In number 4, your explanation of physics is horrid.
Its correct that shotguns won't blow someone backwards but it doesn't require the shooter to fly backwards. This is because the shotgun is much heavier than the shell. The combination of human arm (mass and resistance) and the weight of the shotgun counter the momentum of the much smaller shotgun shell.
Its correct that shotguns won't blow someone backwards but it doesn't require the shooter to fly backwards. This is because the shotgun is much heavier than the shell. The combination of human arm (mass and resistance) and the weight of the shotgun counter the momentum of the much smaller shotgun shell.