A manoeuvre ,or perhaps a family of manoeuvres that is executed on both types of board. Currently back in vogue in the surfing world but perhaps less warm in skating. In skating it is done on the coping or mid wall. Surfers execute them in the barrel or at the lip.
There is something about placing a hand on the surface you are boarding over that is irredeemably honest.The body position and description suggests a lazy/ relaxed attitude.It takes some skill too!
Laid back drawing by Pete Fowler