Ball throws against trampette (Core/abdominal strengthening, throwing/catching ball, with mini-trampoline, standing)

Stand up straight holding a ball in your hand.
Position a trampette propped up against a wall.
The face of the trampette should be at approximately 45 degrees.
Take a few steps back from the trampette.
Step the opposite foot to your throwing hand forward.
From this position, throw the ball against the trampette, and attempt to catch it.
Use the strength in your buttock and core muscles to rotate around, generating more force in your throw.