LPT: If you get stuck peeing in a public toilet, tap the top of the tank

This happened to me on a train, the pee kept coming and I wanted to cry. I remembered my dad telling me that when we were on holiday in Belgium. The tank is usually mounted on top of the tank compartment. Tapping it gently will momentarily stop the flow of water. I don't know why this works, but I'm so glad it did.