Potassium Permanganate mixed with suger (the ratio is not as important as many suggest) will also ignite by friction with out having anything else added
you can try this by putting a small pile of the mixed powder onto an area of flat stone (or paving slab) and rubbing the mixture into the stone with the back of a spoon in small circular movments
with only a small amount of rubbing it will pop and spark then burst into flames
N.B. do not do this with potassium nitrate/Chlorate mixtures!!!!!! YOU WILL LOSE FINGERS
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