Mine: I was walking around a grocery store with one of those Snapple iced tea boxes dangling from one hand, looking for the other thing I ran in to buy. Suddenly the flimsy cardboard side of the box came unglued, and bottles dumped out, smashing open on the floor. A river of iced tea began to run down the aisle. I stopped, looked at a nearby employee who was looking at me, put down the rest of the box and walked away.
Thankfully I don't shop there regularly. And since the bottles were ejected away from me, I didn't get a drop on me. Felt sorry for the guy on cleanup, though.
P.S.: Always support those boxes underneath with one hand to take weight off the handle!