Most recently I had a colony up and running in a jungle zone with high rain, (4111mm a year) and a heat wave was playing hell with my freezer regulation while I trying deal with the aftermath of a raidf. so I quickly threw in a half dozen coolers and set them to -200 something F being in a hurry and promptly forgot about it.
Fast forward a couple days and a group of visitors from Criminologists Rest Stop drop by for a visit, and for some reason a bunch of them decide to take a nap in my freezer. "No big deal I thought, when they get cold they'll wake up and leave."
A couple days later and I notice they're still camped out in the freezer, exploring exciting new careers as meat Popsicle's.
Moral of the story: Sleeping in below zero freezers never ends well.