A metal-munching stuntman has retired after almost choking to death on his bicycle’s pedal.Branko Crnogorac, 80, has downed 25,000 light bulbs, 12,000 forks, 2,000 spoons, 2,600 plates and nearly 6,000 vinyl LPs over 60 years.But he needed emergency surgery after trying to eat a bike in three days for a bet.