The importance of being agile

He sprinted after Terry, rounding the corner just in time to see his friend vaulting a high wall. Without hesitation, he put a foot on a conveniently-placed black bin and flung himself over the wall too, desperate to close in and get the ball back. But where Terry had the agility of a cat, John landed a bit awkwardly and instantly shattered his spinal column, collapsing helplessly to the floor, never to stand again.