My thoughts on this are quite complicated. Physically, the only thing that happens is that our bodies rot or are burnt to ashes. Spiritually, though, I believe we remain as ghosts until we can find peace. When we do find peace, at some point we are reincarnated. Or something. I dunno. Like I said, my beliefs are complicated.

I think we get shoved in the ground or burned up... and maybe our spirits go off to some afterlife, or maybe we just remain on Earth... Dunno.