Hitting the trigger near the tail of the crashed plane two times will throw the switch on the ramp above the trigger towards the inside of the crashed plane. You can tell the path is open when the trigger lights up. With the ball inside the plane, use the flippers to move the platform at the bottom left and right and keep the ball in play. The ball will bounce among the diagonally placed seats and the three bumpers in the corners of the cabin. You will receive a bonus when the ball exits from the plane based on how many bumpers you hit and the seat bumper multiplier.