It is composed of the tail of the board, and its tail is sliding because it faces away from the obstacle.

So it's called tail-to-tail gliding.

He looks a bit like PJ·LADD ... as if he added a somersault when he came down.

If you use a board head, it is called nose sliding, and if you use a grinding rod in the middle of the board, it is called board sliding.

There is also a blunt slide. ....

It seems that's all. Others are generally called grinding.