I worked behind a jewellery counter. Somebody asked me to take out a necklace to show him. I took it out and held it up for him to look. He pretty much vaulted over the counter, snatched it out of my hand and ran out before I could even process what happened.
My manager went crazy on me, claiming that I should have tackled him or something. (I'm a small girl. This guy was huge!)
I pointed out that during training I'd been told not to confront or chase down a thief for my own safety... boss got even madder!
I asked why he himself didn't chase the guy, to which he responded "Are you nuts?! That guy was massive!"
Necklace was only worth around £30. :|