Chris Holder is ALL the PROOF that I need. Had he not slid under the Air Fence and hit the fence behind he would NOT be in the state he is in now. How the Air Fence is anchored though is a different argument which needs to be looked at. The Air Fence WOULD have saved Chris a lot of trouble had his Bike not 'lifted' the fence so that he came in contact with, as I say, the Fence behind.