Replying to Help!! Spinny grabby thing advice please!!

Hi y'all!
Ive been into this ski thing for at least a year now and i really need some advice!!
I saw this guy jonny mosley on tv the other night and he was throwing the RADDEST shit!! How do you do one of those iron crossy mute 180 thingys, that shit looks so cool!
And also, I've heard of this guy Evan Raps? Does he rap? I know one thing.... he has the most STEEZY pencil spins i HAVE EVER SEEN! How do I do that?
PEACE