The paper camera thread gave me a pretty good laugh, and with another round of snow about to hit us, I could use another one.
Mine was back in my days of selling EAS systems. I had a store in the Midwest with the EAS antennas set up very similar to this picture, except the antenna closest to the wall was only about 8" away and the wall was brick.
A very "large" suspected shoplifter thought if she squeezed between the wall and the EAS antenna she wouldn't set off the alarm with the merchandise she had allegedly stolen. The antennas are bolted to the floor and the metal tube style antennas didn't have a lot of flex. About halfway through her potential escape she became wedged between the wall and the antenna. Of course the EAS alarm started beeping and the light started flashing. At this point she began screaming for help and the employees responding had no idea what to do.
They spent a few minutes trying to get her out before calling 911. Both Fire and Police were dispatched. Once FD got there they looked at the situation for a few minutes and decided extraction was the best course of action. Luckily they did turn off the power supply first. They then used the jaws of life to cut through the antenna. This worked pretty well and the suspect was escorted off to jail.
The account showed me the video which I would love to have had a copy of, but of course they couldn't give me. Of all the things I've seen in 23 years of security sales, this was the funniest.