Moving sand

Sand current (also known as Sandfall, Speedy sand or Moving sand) are rapidly flowing sand that can push the player.

Super Mario 64 / Super Mario 64 DS
Sand currents debut in Super Mario 64, where it only appears inside of the pyramid in Shifting Sand Land. It can push Mario off the platform if he stands on it.

Super Mario Galaxy
In Super Mario Galaxy, it appears in Dusty Dune Galaxy. There are three planets that have sand currents. It can push Mario into obstacles like Catcuses.

Super Mario Galaxy 2
In Super Mario Galaxy 2, it appears in Slipsand Galaxy. It can push Mario into a Fire Chain or it can be used as a slope.

Gallery
SMGSpeedySandPlanet1.png|Super Mario Galaxy SMGSpeedySandPlanet2.png|Super Mario Galaxy SMGSpeedySandPlanet3.png|Super Mario Galaxy SMG2 Slipsand Starting Planet.png|Super Mario Galaxy 2 SMG2 Slipsand Rolling Rhomps.png|Super Mario Galaxy 2