Downey Jr knocked 'out cold' in 'Sherlock' fight scene

Hollywood star Robert Downey Jr needed medical attention on the set of new Guy Ritchie movie 'Sherlock Holmes' - when he was knocked out by a giant wrestler.

The 'Iron Man' actor was filming a fight scene with seven-foot-tall co-star Robert Maillet when the big man threw a punch that left Downey Jr "out cold".