As a veterinarian I can't tell you it's not true. When my tortoise is in hibernation (in 40 degree weather just like in a refrigerator) he is still capable of waking up and moving around a little when I poke or move him. He's too cold to want to do that but he's certainly not unconscious and he's not oblivious to a gentle poke. In that situation if I were to cause him pain, I promise you he would feel it. He may not be able to do much about it, but he would feel it. The fridge is not humane.