Well being a seven year old boy it doesn't suprize me he could get in. I could squeeze by a foot wide opening probably..... The door is only one way though, meaning you can swing it in but not out probably. That is why his path was blocked and couldn't get out. He pushed the door open climbed in, probably sideways part of the way. He couldn't get out because he wasn't strong enough to lift the door in and up, and, get into position to climb out. So is my theory.
tylor