It's a really fun idea. I've seen a lot of Arduino projects through this these days. I think this project is the most interesting among them. If I throw a punch every time I get stressed out, I can relieve your stress. I can feel like a hero in a movie for a while. I really like this and I'd like to use it. Thank you for sharing!
RE: Punch Activated Arm Flamethrow - Arduino DIY punch activated flamethrower - real fire bending