Interesting, thank you :)

Let's say the scenario is this:

1. When fully pushed down, there is still room for a human to stand/sit so no way the person would get squashed.

2. No part is stuck and this is a normal environment/medium (a lab in a building so to speak)

3. What happens to the human body when it's pressed down and when it is pulled up? I know it has to do with negative/positive pressure but unsure what would realistically happen

What would happen to a human if they were placed under a giant plunger (the kind you use in a toliet or sink) and plunged? Would the person rip apart?