Over 20 years ago, when I had a Vauxhall Calibra, I parked up, and got out to get something out of the boot, without switching the engine off. The drivers door swung shut before I opened the boot, and the car deadlocked.
The AA bloke showed up, asked me to turn my back, and had the car unlocked in 5 seconds flat. Basically took the rubber grips off his pliers so that the handles fitted into the gap between the front of the door and the front wing, and hit the end of the pliers with a hammer. The resulting dunt was enough to fool the collision sensor into thinking I'd crashed, and pop all the locks on the car open.
His cheery last words as he got back into his van were "How much did you pay for that car again?"