haha, when I was at the warped tour when I was like 10 some guy had some funny hand motion for that. pinky and index finger up like the rock on sign, then ring, middle finger, and thumb touch eachother. then whenever one of your friends lands a trick, you both put your hands like that and pull away and open your hand and say “siiiqqqq”
ah, to be young again. that dude was weird.