Quicksand is a colloid hydrogel consisting of fine granular material (such as sand or silt), clay, and water.
Quicksand forms in saturated loose sand when the sand is suddenly agitated. When water in the sand cannot escape, it creates liquefied soil that loses strength and cannot support weight.
Quicksand can be formed in standing water or in upwards flowing water (as from an artesian spring). In the case of upwards flowing water, seepage forces oppose the force of gravity and suspend the soil particles.
The saturated sediment may appear quite solid until a sudden change in pressure or shock initiates liquefaction. This causes the sand to form a suspension and lose strength.
Quicksand may be found inland (on riverbanks, near lakes, or in marshes), or near the coast.(source from top: Wikipedia).
Various areas in Earth have quicksand areas where humans and animals may not be able to judge or detect from appearance, thinking the sand-rich area is simply a random clumped land mass of dirty sand. Because of this perceptual ambiguity, the prevalence of quicksand danger frequency inspires artists to create adventure-themed quicksand motion picture images and celebrate grasp-uncertainty ideal avatars such as the fictional sand-comprised morphing villain Sandman, a society nemesis who attacks people by changing his sand body like liquid and making irretrievable gripping gadgets.
Are they printing movie posters on hemp/recycled paper yet?