This includes the ability to perform a clean jump from the top of sand,
to platform while impeded by sandfalls, and to escape from a sand floor in water with Gravity.
This also allows using a sandfall to escape a sand floor with HiJump, and using Bombs to escape a 1-tile deep sand pit,
and to cross on top of sand with no items, by spin jumping from the surface and canceling spin before landing.
This does not include simply falling through sand or touching a negligible sandfall or using Spring Ball to avoid interacting with the sand.
See also: Tech Page