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Step 1: Cutting
Step one: Cut out a striking surface of the box of matches.
Step 2: Folding
Step two: Fold the piece in half like I did on the photo.
Step 3: COld
Step three: Put the folded piece of matchbox on a cool surface, such as a water tap while cold water is flowing. The cold surface of the tap will cause condensation of the smoke created in the next step.
Step 4: Fire!
Step four: Take your lighter and burn the hell out of that piece of matchbox!
Just set it on fire while it is standing on your water tap. The tap needs to stay cold so keep the cold water flowing.
After that throw it away and discover the brown substance (tar) on the surface of the tap. (crappy picture)
Step 5: Amaze Your Friends
Put the brown substance on your fingers and when everyone is watching rub your fingers together. Everyone will be amazed! :D