Tell me the pun word of this- show me a piano falling down a mine shaft, and i will show you a-flat miner. and chose 2 meaning of it

1 a musical instrument operated by keys
2 a musical note (chord)
3 a person who works in a mine that has been squished (flattened) during an on the job accident
4 a person who works in a mine and digs tunnels
5 a person under the age of 18

I’m just thinking something from the top of my head so it may not be much so if weathering didn’t exist, there wouldn’t be anything to break up earth’s crust naturally. so by assumptions, the rocks on earth would be larger than they actually are since there’s nothing to break them up into smaller parts.overall, i’m not really sure, but all i know is that it’ll mess up the rock cycle that we have now.hoped this .