And even if it was bigger, and it dislodged bigger rocks, these rocks would basically stay in the same orbit around the Earth as the moon is. The extreme amount

And even if it was bigger, and it dislodged bigger rocks, these rocks would basically stay in the same orbit around the Earth as the moon is. The extreme amount of dV it would take to escape the moon’s existing orbit in the right direction so as to fall anywhere near the Earth makes this scenario improbable. I believe (don’t quote me) that we are talking on the order of 10km/s.