Honestly, what do sharks really do besides swim to keep their gills from failing, and just eating?

Sharks basically live to swim and eat. There's not much concept that can be applied to them to really make a "different shark movie"

Just my 2-Cents

It's not. There's zero reason to return so much just for cleaning. It's not worth it. Gotta put health first. This is high risk. A risk that can cost thousands to fix when something goes wrong. I bet ya gotta sign a waiver too, that prevents this person offering free or cheap treatments to not get sued into oblivion when something goes wrong, which is highly likely.

My issue is, the coming back 3-5 times thing. NEVER have I ever had to return once for a cleaning. This doesn't seem safe to me, and I don't want to risk my 30+years zero cavity perfect teeth to this sketchy return 3 or more times thing for a simple cleaning that should take less than an hour on a 1 time visit

Awesome. It truly is the world's biggest 3D Puzzle. Makes my Burj Khalifa puzzle seem tiny, and that thing is huge.