Flair is definitely a lincoln in the pipe with a 180 to land forwards on the transition. Flatspins can be done on jumps not just in pipe. Underflip is an inverted cork 5, so you are throwing a lincoln in the same direction you are spinning, instead of the opposite direction when you rodeo.
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Classic NS right here:
Shadow7: i know i sound like a total newb whos JON?
SeanPistol: jon olsson. the sweedish guy that wears wierd suits and skis for head.
Shadow7: oh yea him lol thanks for DE-newbeing me
seanPistol: no. you are still a noob.
Shadow7: and your a fag
seanPistol: and you are a little bitch.