You probably won’t get stuck in quicksand. But if you do, you can use physics to get yourself out. Real quicksand is certainly hard to get out of, but it doesn’t suck people under the way it always seems to in the movies. Quicksand Science : Why It Traps, How to Escape. If stumbling into quicksand ranks on your list of worries, don’t panic. You won’t sink in—at least not all the way.