What the heck are those poles/spikes in the back ground? Giant punji stakes? And the rider smacked back into the air by his own bike with enought altitude for the giant spikes to be a concern. DAY-UM!
That's the kind of fence they use in Yurp...'specially in the North. They're poles strung together with wire. They work pretty well in the winds they get there. That's why I suspected the pictures are from the Isle of Mann.