Don't feel too bad. A friend of mine spotted a deer, jumped out of the truck with his rifle, laid the rifle across the hood and touched one off, and gouged a furrow in the hood of his truck because the muzzle was pointed at the metal.
Another guy I knew grabbed a rifle (loaded) in the rifle rack and touched off a round right behind his brother's head. His brother was not amused at all, what with the loud ringing in his ears and a hole through the cab right behind the door. Took his brother about 10 seconds to beat the crap out of him. Wouldn't speak to him for over 10 years.