[2.2.8] Quicksand FOFs don't like reverse gravity.
Messing around with Quicksand FOFs and wanted to see how it would play out with reverse gravity... seems like they don't get along well.
While in reverse gravity, being inside a Quicksand FOF will prevent you from jumping, also... if you attempt to go off a ledge like a sandfall or something... it'll 'crush' you.
It also ignores the sinking speed meaning that you'll fall normally, but you can still jump while in it which stops you from falling briefly. Not shown in the gif but if you spindash/roll while inside you'll be stuck in your spin frames.
Here's the test map I used while gathering the gifs. It replaces MAP01.