I worked at the high school I attended for a few years after. The lockers needed to be painted, but when they removed the built in locks, it reset them to one of three possible combinations....3 days before school started. So my coworker handled the records and I opened 1000 lockers working late into the night those 3 nights. By the end of it I could open any locker no matter the code just by feel. One of my favorite employment memories. Everyone was so happy we pulled it off.