Things Thats Probably Wouldn't Even Kill You...
So, starting with the movie tropes that are actually nothing to be scared of, death by quicksand is much less of a problem than we were all led to believe as kids.
There was a time between the 1960s-80s that you couldn't move for films containing death by quicksand, but that figure has swiftly plummeted to near enough zero in recent years. This is probably due to the natural half-life of a Hollywood cliche, but also probably has something to do with the fact that quicksand won't actually kill you.
The human body, with a density of 1 gram per cubic centimetre, is able to float on water, let alone the much denser quicksand (2 grams per cubic centimetre).
Should you ever find yourself stuck in quicksand, you're unlikely to ever sink any further than your chest, and that's only if you panic. The real danger usually comes from a rising tide that drowns the quicksand victim, but as that is not technically the quicksand doing the killing, it takes the lowest spot on our list.