Mo Farah's rival Kamworor falls at start of World Half Marathon in Cardiff
Kenya's Geoffrey Kamworor, a leading contender in the men's World Half Marathon, has a disastrous start - slipping and falling as the starting gun is fired in Cardiff.
Incredibly Kamworor worked his way through the field to win the race, while Farah finished third.
WATCH MORE: World Half Marathon bronze 'disappoints' Farah
Watch all the action from the men's and women's races on BBC iPlayer.