As we were getting ready to take a break, my father placed his fiddle on top of my guitar amp. seconds later, my guitar strap came loose (at the neck end), sending the head of the guitar swinging down axe-like and INTO my father's fiddle. I gasped, immediately grabbed the guitar neck to raise it up, with his fiddle firmly impaled on the end.
The crowd got a few chuckles, but it was a looong ride home.