it's a natural response. your body is like, you have to do something. >> remember these hard enough. you ever have flame burst out in your hands? >> what you're going to have to do first is call it a burnout. left foot on the board almost touching the hole. now, we'll twist this around the stick. what i do is i just clamp -- this is the clamp, hook, turn. >> clamp, hook, turn. >> flat side on the bottom. >> we're going to want this like that. okay. >> tell me about the device itself. you made that? >> yeah, this is called a bone