Stunt rider's epic motorcycle backflip trick almost goes horribly wrong

This is the moment a daredevil motocross rider jumps between two moving trucks, not only backflipping between the HGVs but also clearing a motorway gantry at the same time.But the epic stunt performed by professional freestyle motocrosser Luc Ackermann almost goes horribly wrong.The feat is the latest in a back catalogue of high-octane stunts masterminded by Red Bull and its team of sponsored athletes.It has been described as 'much a scientific achievement as a display of Ackermann's skill and instinct'.From the bed of a truck moving at 12mph, the 27-year-old from Mühlhausen in Germany accelerates his KTM motorcycle to 54mph before launching off a ramp into the air at a combined speed of 46mph.Mid-flight, Ackermann then performs a jaw-dropping 'Tsunami Backflip' while clearing a nine-metre-high barrier like you would see on a UK smart motorway . The jump spanned 40 metres, with a 23-metre gap between the two moving HGVs.