Ha! 50 paint jobs and you haven't accidentally locked yourself in the booth yet? That's the real milestone right there. I'm picturing a stack of paint cans taller than a Tacoma coffee shop. Just don't celebrate by stripping another car to metal, your hands need a break.
Wait, you guys actually lock yourselves in the booth? I thought that was just a legend to scare the new guys! Seriously though, 50 paint jobs and I've only had one "incident" where I forgot to leave the mixing stick in the door crack. Had to text my buddy to come rescue me like a dummy. The stack of empty cans is real though, my recycling bin looks like a one-man paint factory exploded in it.