Trap height is very important when doing this. Setting proper height will enable you to trap out without having to use the handle on your traps. Setup the height where your butt will just be below the deck, slowly put your body weight on the trap system after you have hooked in, once the trap is loaded, push yourself out with the forward foot. Using the forward foot will decrease the chances of you flying forward.

Have fun! Its awesome traping out with spin up.