A football practice device having pads in the shape of a player with feet on the ground and leaning forward with bend knees. The linkage mechanism is secured to the support frame. The third and fourth side surfaces are located between the first and second side surfaces so as to face each other, and the emitting surface and the opposing surface face each other. The first common format playlist is transferred to the second personal media device. The final damage estimate can be further processed or formatted for compatibility with aircraft maintenance systems. Oxygen is diffused into water by the diffuser to generate aerated water.