Check out my Mk. 2 Wrist Mounted Flamethrower too!: http://www.instructables.com/id/Two-Stage-Wrist-Mounted-Flamethrower/
This is a wrist-mounted flamethrower that I made. I've wanted to make one ever since I saw the first Iron Man movie back in 2008. It's very similar to other wrist-mounted flamethrowers online. I made a holder for the butane canister and the fuel release mechanism out of plexiglass and some steel rods. The assembly itself is held to my arm using Velcro cable ties. For my ignition, I modified a stun gun that I bought on Ebay.
I took pictures to write a full Instructable on this project, but earlier this week, there was a shooting at a high school near me, followed by two bomb threats in different nearby high schools. In light of those events, I have at this point chosen not to make a comprehensive step-by-step. I am confident that if you want to make a wrist-mounted flamethrower, you will be able to figure it out by looking at this and all the other videos of them online.
Thanks for watching! Be safe, have fun!
*This Instructable is entered into the Extreme! Challenge. What could be more extreme than shooting fire out of your hand?