An old Boss of mine at BT, a man that was despised by all of us, as he ran off with the wife of someone in the office ( ! ) was using the large industrial shredder one day, and his tie got caught up in it !
I wasn't in on that day, worst luck, but somebody who was, told me all about it. He was calling for help, as his face was getting rather close to the machine, and he couldn't reach the off/reverse switch.....my informant told me that nobody moved to help very quickly that day, to help, as they were all enjoying the fun too much !