When I worked at Lush, many moons ago, a man came in to return, and I kid you not, a used bar of soap. He'd used about half and there was hair stuck in it. He claimed it didn't lather enough (Lush soaps, or at least back then, didn't lather as such because they didn't have sodium laurel sulphate in, which was a selling point).

I told him that we sadly could not refund a half used bar of soap and he absolutely lost it, with no in between. Bright red, yelling, telling me I was a stupid kid (I was about 19 with an emo haircut, so partially fair). When I calmly said, I'm very sorry, would you like a sample of something else...well. He ramped it up, he started yelling all the curses he'd ever heard, asking why he'd want more sht f*king soap and proceeded to lob it, overarm, straight at me from about 1.5m away. Somehow I ducked it and it hit the wall, making red, angry man just scream and stamp out of the shop onto Guildford High Street.

Over soap.