Rather a silly question, but! I need to know what exactly happens when a door is kicked in. You see it happen all the time in movies, but I'm not sure what's actually going on mechanically. The door doesn't actually come off the hinges, so it's not the hinges giving. So what's happening on the doorknob/lock end that the door flies open like that? I know this probably depends on the lock (I can't imagine one of those doors that locks by sliding a metal bar into the doorframe or whatnot could be forced open easily by a kick) but I'm not going to be very specific about what kind of lock it is. In fact, I don't know much about locking mechanisms at all anyway, so information on that would be helpful too. Thanks.