biker down a12 eastway tunnell

Poor dude was laying on the sidewalk halfway into the tunnel dazed. Cars had stopped must have just missed it. I and a BMW stopped rider was ok. Bike was facing the wrong way in the right lane. Apart from a bent rear brake level bike looked ok. Was his wifes CG 125. He said was first time hed ridden it and road looked dusty under there. Hes been riding 15 years, rides a big bike usually. We put it down to not having stickier tyres!