Applegran, this is a brilliant thread, thank you, and I'm very pleased you got your handbag back!
When I was in a shop yesterday, the lady at the till, who is only 18 and it's her first job, is still in training - it's a normal Casio TE-100 non-scanner, the till wouldn't open as the drawer got stuck! It was only her on duty, and the manager was nowhere to be found, so I asked her if she knew there was a secret release button under the till; she didn't.
With no manager and no CCTV to catch me doing it, I quickly lifted the till and showed her the button, and the drawer came pinging out!
She was so happy and thanked me!