Must have been relatively common in days gone by....
I'm guessing this wasn't unheard of in Ireland in days of old...
The tradition of the "wake" was to get lots of people in the room with the supposed corpse overnight and check whether he'd wake up. I mean, do you really want to warm up a room with a dead body in it? No. Unless you thought they might have just gone into "cold sleep".
I'm curious as to whether blood starts to settle out into component parts during cold sleep (do nemotodes have blood like ours?) -- the evidence the Romans took for Jesus being dead was that his blood had separated. Would make for an interesting bit of historical forensics.


