Many chain-drive doors can be opened simply by pulling up on the handle hard enough to make the chain rotate the motor. Once the motor starts moving it kicks on and raises the door.
I like seeing stuff like this, it raises an awareness of a vulnerability that thieves already know about. I liked learning that my extremely secure Audi with the vacuum-driven door locks (impervious to slim-jims and coat hangers) could be opened with a cut-out tennis ball placed over the key hole and used as an air pump. And that a can of gum freeze will make a steering wheel lock fragile enough to shatter with a tap of a screwdriver.
