If the Moon lost orbit somehow for whatever reason, how would the timeline of the crash look like.

I'm thinking of these ingredients:

- slowly dropping free fall

- at some point it will enter atmosphere, what happens to the Moon?

- tidal waves, will the Moon break up and would cities be flooded during downfall

- say the Moon crashed into solid land, wat kind of crater would it leave, what would it do the the immediate surrounds (shockwave?)

- what happens to the atmosphere if anything at all, and what about the magnetic field?

- will humanity survive or perish, and by what cause?