Take a 3 (or 4 is you feel like a challenge!) digit locker and put a random number as its code (reset the number on it with your eyes closed)
Strip off, tie your ankles to the end of your bed and your dominant hand to the bed head. Tie your non dominant hand as well (loosely) but so that the combi lock forms part of the tie up. Now get lock picking! You'll be stuck naked face up on the bed until you can pop the lock, then feel free to untie the rest of you, don't get walked in on
