[sstarr]

I was once contracting at a company which developed software for the police and other emergency services. The server rooms all had electronic card readers on the doors so that only people with the right security clearance could get in.

One day there was a power cut which meant that all the card readers stopped working and we couldn't open the server room doors. After ten minutes of scratching our heads and worrying about the UPS batteries running out, someone had the bright idea of dragging a desk next to the door, moving a couple of ceiling tiles and climbing over the partition wall.

The guy didn't get fired but I'm not sure if that particular vulnerability was ever fixed.