"What the f*ck was that?"
The old Mayor of Hiroshima joke, side clutching.
I remember dropping the pulley for the front winch point of a Vulcan engine change onto the head of someone standing on top of the engine supporting the weight of the winch. I saw it hit him and he went over like he'd been shot. He was bigger than me and I was in fear for my life, one of my mates said I was shaking like a $hitting dog, something that's always stuck in my mind!