Langley, you could add "Thunder flashed" to the list. One hooligan Rock-ape decided to do this to the mess piano at Gutersloh after it had been slid own the steps into the Keller Bar. I saw it coming, realised what was about to happen and curled up in a ball behind a stone pillar with my eyes and ears covered. In such a confined space the bang was felt as much as heard. Others obviously thought it was just a small firecracker and suffered the consequences for their mistake!