All the rules are just made up

There was a bank robber who pulled off a heist this way. The mastermind was a hairdresser named William Smarto. He realized that the safety deposit boxes in the vault of an Illinois bank formed a dead space, just like this one. He walked in on Saturday, hid in the dead space, and when everyone was gone, he climbed out and stole over $1,000,000 from the other safety deposit boxes. On Monday, when people were coming and going, he found an opportunity to climb out of the dead space without anyone seeing him, and simply walked out of the bank with a duffle bag full of everyone else’s valuables. He got away with it, but was ultimately caught trying to do a similar trick at another bank.