It’s a real thing and no joke.
Davis Gulch in January, super-saturated sand for about 10 yards up the creek from waterline.
It’s not everywhere, just be aware and when you feel that ‘sinking feeling’ keep moving…don’t let it grab hold of your boot, that’s when things get serious FAST.
A paddle or walking stick can come in handy to help a stuck partner maneuver to firmer ground.