They behave more like a liquid when exposed to stress. This lubricates the sand particles and makes them unable to support any significant weight, since they move around with very little friction. The water moves up and then down slowly in a convection-like manner throughout a column of sand, and the sand remains a generally solid mass. Water circulation underground can focus in an area with just the right mixture of fine sands and other materials such as clay. Quicksand may be escaped by slow movement of the legs in order to reduce viscosity of the fluid, and rotating the body so as to float on one's back (supine). It can be difficult to get out: that is the real problem. A human or animal does not sink entirely into quicksand due to the higher density of the fluid. However, a person does not drown in quicksand. If animals or people stand on it, they sink into it. It has the characteristic of thixotropy: it looks solid, but when pressure is applied it liquifies (acts like a liquid). Then the robots get stuck and sink but grab Judy's leg to get free.Quicksand is a mixture of water and sand or silt. Heinrich Ibsen's steampunk robot duplicates of themselves, Judy gets stuck in quicksand so Alan and Peter have to rescue her. Van Pelt managed to swim out of the Quicksand and quickly retrieved his rifle to continue the hunt. Alan saves him after he tosses away the rifle, but regrets saving his archenemy when Van Pelt tries to kill him with a pistol and fails, pushing him back into the pond. In Night of the Hunters Alan is nearly caught by the two hunters, but escapes while they're arguing and Van Pelt starts to sink in quicksand. In Ransom of Redhead, Nora Shepherd unwittingly steps into a pond of Quicksand against Judy's warnings, still under the impression she's dreaming, which she regrettably reconsidered after her ordeals in Jumanji. Heinrich Ibsen's steampunk Hippopotamus, which sank in quicksand because of its weight and inability to drag itself free. One such instance being in Master Builder when Alan, Judy, and Peter were chased by one of Professor J.S.
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Quicksand appears in the animated series as dangerous environmental hazards, but it can also be a good method of chase evasion if carefully avoided.
Objects in the liquefied sand sink to the level at which the weight of the object is equal to the weight of the displaced soil/water mix and the submerged object floats due to its buoyancy. The cushioning of water gives quicksand, and other liquefied sediments, a spongy, fluid-like texture. This causes the sand to form a suspension and lose strength.
The saturated sediment may appear quite solid until a sudden change in pressure or shock initiates liquefaction. In the case of upwards flowing water, seepage forces oppose the force of gravity and suspend the soil particles. Quicksand can form in standing water or in upwards flowing water (as from an artesian spring). When the water in the sand cannot escape, it creates a liquefied soil that loses strength and cannot support the weight. Quicksand forms in saturated loose sand when the sand is suddenly agitated. Quicksand may be found on riverbanks, near lakes, in marshes, or near coastal areas. In the dimension of "Jumanji", Quicksand serves as a natural trap for herbivores or predators, leading to either drowning from total submerging or dying from exhaustion trying to drag themselves free. Quicksand is a colloid hydrogel consisting of fine granular material (such as sand, silt or clay), and water.