Abstract: An air distribution system includes a portable air compressor feeding a flexible branched air distribution hose. The hose includes branch air lines branching from a main air line. The branch air lines have multiple exhaust ends on distal ends of corresponding branch air lines, distal from the main air line. The exhaust ends are adapted for mounting to an air inflatable structure in fluid communication therewith. The main air line has an infeed end adapted for mounting to the compressor in fluid communication therewith.

Abstract: A sport ball arresting structure may be characterized in one aspect as including an inflatable quadra-pod mounted on a substantially rectangular flexible planar base for placement on the ground. The quadra-pod includes four legs formed, when the quadra-pod is inflated, by two criss-crossed inflatable tubes forming a dome. The tubes are criss-crossed at a vertex of the quadra-pod. Lower ends of the four legs are mounted to the four corners of the base, one lower end per corner. A flexible net is mounted within the dome so as to drape completely across the interior of the dome and parallel to an entrance to the structure defined by a front pair of legs and a front edge of the base.