I was at a friends house and we were watching tv, sitting completely still and being silent. Suddenly the lid of a metal cup (that was standing on a shelf above the TV) flied straight up, hit the ceiling with a loud bang, then came down again, and hit the floor in front of us. Naturally we were very spooked.
We were looking for some explanation but couldnt find any reason this would happen. It was alot of force coming from nowhere.
Made me open minded when it comes to these things.
I have one too that i cant explain.
I was at a friends house and we were watching tv, sitting completely still and being silent. Suddenly the lid of a metal cup (that was standing on a shelf above the TV) flied straight up, hit the ceiling with a loud bang, then came down again, and hit the floor in front of us. Naturally we were very spooked.
We were looking for some explanation but couldnt find any reason this would happen. It was alot of force coming from nowhere.
Made me open minded when it comes to these things.
Thermal expansion / contraction?