O'Keefe Elevator Co.

I keep a baker's dozen of these handy whenever I'm out and about in the world, 'cause you never know when you'll need to stall someone who's tailing you - and these little signs always do the trick...just take a quick turn, duck down an alley, hop onto an elevator, and just as the door closes, slap one of these bad boys on the door. They won't know what happened!