On woodward camp if you go down the roll in (the place you start)and while you do the gap over the titanic deck spin spin spin!!!!!
If your lucky you will do a 1080 I did this before its kind of hard but I suggest you use a fast spinning move (like superman)to get it easy!
Also on galleon water park on multiplayer you can make your bike fly by preesing up,y,l,and r at the same time if done correctly your bike should fly up.