FILM CANISTERS 2 (Originally By Bill)

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For a relatively low shrapnel explosion, I suggest pouring it into an empty 35mm film cannister. Poke a hole in the plastic lid for a fuse. These goodies make an explosion audible a mile away easily. 
Poke the hole before putting the flash powder into the cannister. 
Don't get any powder on the lip of the cannister. 
Only use a very small quantity and work your way up to the desired result. 
Do not pack the powder, it works best loose. 
Do not grind or rub the mixture - it is friction sensitive. 
Use a long fuse. 
-= ONDA =-