The tranquility of a late morning swim suddenly shattered by a flashmob style free exercise session. An elderly lady proves to be an early casualty and is escorted out of the water, whilst a lifeguard springs into action, standing like a 4th match official at the edge of the pool. Meanwhile an instructor places a number of swimming aids and a boombox poolside, before pressing play and launching into a series of arm and leg movements. Like a flock of airborne birds suddenly changing direction swimmers face towards her and, on cue of the motown medley, start to repeat her gestures. A variation on the welfare state.