Movies lie about this. It’s impossible for a horse to pull you out of this predicament. The force needed to extract a trapped foot (ten thousand Newton) is equivalent to that needed to lift the average family car! You could escape – without any legs, that is.

The best way out is to rebuild what you’ve broken. Making small circles with each part of your body will allow water to move between the sand and clay, reducing the density and making it easier for someone to pull you out.

Luckily it’s impossible to drown in quicksand. You’ll only sink in halfway. Why? The density of quicksand is twice the density of a human. So rest assured – you’ll only be stuck until someone eventually finds you…

Source: Naked Scientist