Toothpaste Mutiny
What happens when you've just placed toothpaste on your toothbrush, you get distracted by something in another room, and it falls off into the sink.
I had just put the paste on my brush when my roommate grabbed my attention, and right before he finished speaking, I heard a splat. The toothpaste I had just put on my brush had decided it didn't want to go in my mouth, so it committed Toothpaste Mutiny.