ok real help:
step 1:i'm assuming u can send a 720 on the tramp. so what ur gonna want to do is start trying to send a 7 completely erect (hehe) and land flat on ur back.
step 2: u spin on the EXACT same axis, but once u've spun a 3, try to bring ur knees up to ur shoulder in order to redirect ur weight.
step 3: spend like an hour complete failing, get pissed, and go inside and play cod on ur ps3 for a few minutes.
step 4: notice fucking PSN is still down and huck ur controller through the window.
step 5: go back on ur tramp and send it the same way u were sending before when u were failing.
step 6: for some reason u can now stomp it like a pro. or just keep trying if u dont got it yet