this was a good idea. i got a 2 liter the titan dart and the pipe thing and to my surprise the pipe screws on the bottle . so i brought it out and jumped on it. it went about 80 ft far and about 30 ft up. i was cool, and the bottle broke on my first try , so i had to find another one, so to make it all you need is the titan dart, pipe, and a 2 liter bottle .