When Patrick Morrison left hospital after having his right foot amputated, he thought the sense of imbalance he felt would vanish once he got used to his newly fitted artificial foot. But it was not until five months later, when he took off the protective socks, that he realised he had been given two left feet. A prosthetic limb specialist had fitted an artificial left foot to his right leg - and failed to spot his mistake during two further check-ups. The foot was also too big - made to fit a size nine shoe rather than a size eight.