Swing; Defective S-Hook
A 6-year-old boy was playing on an outdoor swing. The swing could easily be removed from the chain, and in fact this is what the boy did. The boy then climbed the chain and slid down it. The second time he did this he slipped and he was castrated by the exposed S-hook which held the seat of the swing. The use of the "S" hook design is the basis for design negligence liability.