Sucked feet first down the tube (2010)

Aren't there drains specifically meant to limit the possible pressure differential, after people's organs got removed by ones than didn't have that feature?

Relying on a human operator for safety when you could make something inherently safe still seems like a design issue.

I haven't been to many pools, and only ones with a shallow end, but I don't think I've ever just seen an open pipe hole