Unfortunately, it's hard to reverse a cremation!A near death experience is one thing, but being sick and in a coma is another.
Even as few as a couple hundred years ago caskets were built with a bell to alert others the person wasn't dead.
Of course, that was before embalming was popular. You know, to make sure they were dead. LOL
Safety coffin - Wikipedia
en.wikipedia.org
I read that ancients Israelites would visit the family tomb for several days after a relative deceased, to make sure they were really dead, and not just deeply comatose.
There is some speculation that is precisely what the three women were doing going to the tomb on the third day after the crucifixion.