Motorbike riders collide as terrifying stunt goes wrong

This is the horrifying moment three motorcyclists crash into each other during a 'Thunder Dome' circus act.

The accident happened on Saturday in front of a packed crowd at Gandey's Circus, at Aintree Racecourse.

According to The Daily Mail, two of the stunt riders were using replacement bikes after their usual ones had been stolen.

The female rider, named as Glennis Girling, was left with a broken ankle but is recovering well in hospital.

You can see what happened in the video above.