This technique is a specialty of Gaara's, where he makes the land a stage for his representation. This technique is identical to Sand Waterfall Funeral in that the stream of sand crushes the enemy. But as far as scale goes, this is in a totally different league. One may be able to hold their own against a single attack, but multiple obliterations are where this technique shines. Gaara slams both hands down onto the sand, creating powerful shock waves that compress the sand. Anything buried in the sand is subsequently crushed.
Using a pun common to Gaara and his techniques: "sand waterfall" (砂瀑, sabaku) is pronounced the same as the Japanese word for "desert" (砂漠).