Answer:
That's because quicksand is just like any other fluid in that things that are less dense than the quicksand will tend to float in it. Quicksand is denser than the human body, so it's not possible to just sink all the way under. This means you aren't really ever in danger of drowning in quicksand.
What does it feel like to get stuck in quicksand?
There's pressure, sliminess, and a profound sensation of being stuck and gripped, especially if you try to pull away.
(I Hope It Helps!)
