2 kinds of shuvit - push and pop, push is sliding it around, pop is ollie around ( i am skateboarding geek..). Push - take back fin off to learn, push very hard, 180 push shuvits can be used for tacks, u can slide 360 ones too. I did them on my shortboard after stealing them off some dude on a finless 9ft longboard at mokes doing something similar years ago.
pop shuvit hardest, easiest off a small bit of chop of a small lip on a wave, ollie like 40 degrees frontside and let board keep going, you stop and straighten yourself back out so you remain facing same direction but not your board , then turn 180 to going forards again, backwards surfboards bog down loads quick unless real windy.
fs 180s trick is to ollie higher that the fins then you have no worries pushing it around in the air, i flick mike back quick as once again unless cranking my small surfboard does not like to ride backwards very much.
cool to see some new stuff on strapless surfboards looking good, was never really into strapless board off dangle stuff but new tricks are lookin good/skilled with less dangle and more style Keahi's front 3 with late 360 shuvit, that is awesome