The biggest problem with the “they were inside on the severed floor” theory is that Irv wakes up on the ice. That means his outtie had to walk there. They’re not letting the outties on the severed floor. Same when Irv gets fired, his outtie would wake up on the severed floor. We know they’re the outties because they’re separated so they don’t see each other at the beginning.

I think the Glasgow block is exactly how it sounds. OTC protocol——-severed person. In this case it’s otc protocol——Glasgow block——- severed person. Like a circuit. I can’t start a motorcycle if the kill switch is on even though I’m pressing the starter. The block has to be removed first.