Abstract: An exercise device having opposed angled rebound surfaces that will fold flat together, and support structure for the surfaces that will also fold compactly. The device also includes adjustable legs which allow angular relation between the rebound surfaces. The adjustment structure includes a lock and sleeve bracket which moves longitudinally on the frame member to accomplish the angular adjustment.

Abstract: A trailer hitch for attachment to a vehicle bumper for providing releasable coupling with a trailer coupling member. The hitch includes a coupling ball partially surrounded by an enclosure extending above the top of the coupling ball. A safety bar is received in slots formed in the surrounding wall. The safety bar, when installed, overlies the coupled arrangement of a ball joint and trailer coupling member so as to prevent their unintended separation. Further, the walls surrounding the coupling ball are pivotally mounted to the vehicle bumper and include a spring which contacts either the vehicle or its bumper to orient the enclosing walls in a preferred direction.