26 year old Didier Avenet, after eight years of practise, has become an expert in downhill skiing on all terrains including those not covered by snow. Gradually he has widenend his field of aciton and set himself a challenge which combines all his experience in the many sports activities he practises. It is a combination double roped descent, advancement in underground and passages, a race with skis on underground gravel and then parapenting. A number of sports that could be called sheer madness.