Izzy is indeed correct. The Holy Spirit levitated Peter's living breathing body to Rome, inverted it, placed it on the cross, and then magically transported the body to the catacombs for burial.
I know I saw it when I was there with L. Ron Hubbard.
Izzy you are so gosh darn cute when you try to appear well read. Now please be quite while the adults are trying to have a conversation.