If the Moon were to hit the Earth, the consequences would be catastrophic. The impact would likely result in a massive global catastrophe, including massive tsunamis, widespread fires, and a massive shockwave that would destroy most of the planet's infrastructure.
The collision would cause a tremendous amount of energy to be released, equivalent to the explosion of several billion atomic bombs. This would cause a massive amount of destruction and would likely cause the extinction of most forms of life on Earth.
The impact would also cause the Earth's rotation to change, which could cause severe weather patterns and climate changes. The dust and debris thrown into the atmosphere would block out the sun, causing a "nuclear winter" effect and making it difficult for life to survive.
In conclusion, such an event would be extremely unlikely to happen, as the Moon's orbit is stable and predictable, and it's not heading towards the Earth.
