Speed, excitement, danger. You can find all these in the different extreme sports that have become popular last 10 years. Take bungee jumping. You jump off a bridge and you fall and fall, and then, just before you hit the ground or water, an elastic rope pulls you back. In skysurfing you jump out of aeroplane and use a board to «surf» the air, doing gymnastics in mid-air! And extreme sports on land can be just as dangerous.