Step 1: Do it outdoors!
Instead, I had a can of burning meths ricocheting around my ears.
(Note to self - buy fire extinguisher!)
Step 2: Materials and tools.
- An empty tin of tomatoes (ring-pull kind).
- An empty can of coke. I only ever drink the full-sugar caffein-riddled version, but I don't think it's vital to the efficiency of the projectile...
- My Instructables Leatherman. It's a well-used tool already. I even use it to open the shed since the door handle disintegrated (I really must get round to fixing that).
- Matches. Long ones. You'll see why.
Step 3: Make it.
Use the pliers to rip the top out of the can. No need to be pretty, but try and avoid too many sharp ragged edges, and don't bend the can, otherwise it won't fit smoothly into the tin.
Step 4: Fuelling and Firing
Drop the can into the tin - if the fit is right, the can should take a moment to slide down as air forces its way around the sides and through the small hole.
Put a finger over the hole and give it a shake to generate plenty of vapour. Watch for spills from between can and tin.
Stand the can somewhere clear and firm.
Touch a flame to the hole.