Naked man challenges Pamplona bull - and loses

He might have been high on adrenaline and low on sleep - but it was no excuse for this naked bull-runner who was detained by police shortly after being thrown into the air by a young calf.

He joined thousands of thrill-seekers to run with the bulls on a crowded fourth day at the San Fermin festival in Pamplona today.

Ten people were injured and no one was gored.

But the now infamous streaker, who was tossed up into the air by a young calf in the bullring after the running, was arrested for causing a 'public disturbance'

Running scared: Bull-runners scramble as a naked man is launched by the young calf

Falling down: The streaker took a mighty tumble after being thrown up into the air by the calf

Several runners tripped, fell and were trampled as crowds raced alongside the massive bulls of the famous Miura breeding estate, founded in 1849.

The Sunday run is usually the biggest of the eight that take place annually and is particularly favoured by aficionados because it traditionally features Miuras, renowned as Spain"s largest fighting bulls.

Navarra Hospital reported in a statement that 10 people received treatment for minor injuries including arm and head trauma. Nine of them - all Spaniards of ages ranging from 19 to 41 years old - were kept in for observation.

The naked bull-runner suffered minor bruising to his face.