skiing and, well, flying. >> basically after a certain speed the kite tube will gain lift and fly behind the boat. >> soon chris invites his friends to the lake to try out his new toy. >> chris called me up one day and said, hey, i got this kite tube. you sit on it kind of like a jet ski and it has a 15-foot wing span, and you can actually get, you know, 10, 20, 30 feet of air. i was like, count me in. >> what really excited me about kite tubing was the adrenaline rush i knew would come from it that looked amazingly fun. >> one by one, they all tried to master this strange sport. but it's hard. >> you've just got to grip it and rip it, take a chance every once in a while. >> finally it's chase rushing's turn. and he can really do it. >> i was excited. i was going higher and higher. it's an awesome feeling. >> i watch chase go up in the air. i'm thinking to myself, dang, there that boy goes again, he's