pack a punch/wallop
to provide a burst of energy or power or excitement
The storm packed a wallop and did much damage to the boats.
Rules to play Paddleball
Court fixtures are the posts, the net, the net hand crank, the cord or metal cable that holds up the net, the band across the top of the net, the center strap, the screens, the snow boards, the superstructure, the doors, the lighting poles and lights, any diagonal corner support beams within the enclosure, and, when they are present, the umpire and umpires chair.