Usain Bolt of Jamaica is comforted by his teammates after falling to the track in the men's 4x100 relay final during day nine of the 16th IAAF World Athletics Championships London 2017 at London Stadium in London, United Kingdom, on Aug 12, 2017. [Photo/VCG]

LONDON - The London World Championships just can't stop popping up surprises which could hardly be pleasant memories for Jamaican great Usain Bolt and home hero Mohamed Farah who both bid farewell to their careers.

In his last race of his career, Bolt limped off the track while hosts Britain took the stunning 4x100m victory to the ecstacy of the capacity London Stadium spectators, a never better redemption for the disappointing silver in the men's 5,000m.

Bolt, running the anchor leg, staggered halfway down the straight, dropping the baton before falling facing down. Dreaming of hanging up his running spikes as "unbeatable", the 11-time world champion and 8-time Olympic titlist limped across the finish line.

Beijing worlds silver medalists China finished fourth with second-leg runner Xie Zhenye just coming back from injury.

Farah failed in his quest for a fourth 5,000m world title in his farewell race just like Bolt as Ethiopian young gun Muktar Edris, 23, seized the glory from the 34-year-old.

Like Bolt, Farah would finish his career with an usual feeling of defeat - he had won this event in the past three world championships and two Olympic Games, together with three world titles and two Olympic gold medals in 10,000m. However, he remains hero of the country, bagging one gold and one silver in London.