Ben Spies was lucky to escape serious injury when he 'hit a wall' after falling during Sunday's wet British MotoGP at Silverstone.

The Factory Yamaha rider, who took his first grand prix podium in last year's event, was involved in a battle with countrymen Nicky Hayden and Colin Edwards for fifth in the early stages of the race.

Settling into sixth, Spies' race came to a sudden end on lap 8 of 20 when he fell going into turn one, crossing the gravel and hitting the wall.

The American was taken directly to the medical centre for precautionary scans of his back and neck and subsequently given the all clear.

"The track was really wet, when I hit the brakes going into turn one the front just dropped away and I hit the wall before I knew it.

"I hit my back pretty badly, my back protector is really busted up, but it did its job," said Spies.

"I'm really sore and will probably need a big cushion for a few days but I'm happy it wasn't worse. We'll take a few days to relax and recover then come back fighting at Assen."

The accident marked the third DNF in six starts for Spies, whose team-mate Jorge Lorenzo also crashed out on Sunday.