I thought of this the other day as I was at a restaurant using the urinal. It's a really bad situation as your back is turned away from the door, or what's behind you, not bragging hear, but your hands are taking care of business, and you're in a really precarious position with "it" hanging out. After analyzing this situations, I've started using stalls w/doors, locking them, and staying observant to anyone in the restroom or coming in.