Am I assuming correctly that we’re looking at a big succ-situation, where the diver will big forced through the tube no matter what?

It’s a difference of like 10 psi over an area of what looks like maybe 30 square inches, which would be uncomfortable to get caught in, but I don’t think you’re getting Buford Dolphined

Ahhh yeah that’s where I’ve heard it before, WTYP had an episode on that!