I used this successfully by dropping 5 .22 shells and directly lighting it with a lighter. But I was caught in the explosion. I tried: putting down the shells and hitting it with a flamethrower (didn’t light), laying 1 rag in a line of tiles away and lighting the end one (caught everything on fire - didn’t blow the wall), laying a line of gunpowder to the shells and lighting the end one (gunpowder didn’t catch the next one on fire), throwing a lit torch on top of the pile (didn’t light them), shot pile with finger mounted laser (didn’t light). What is a good way to blow up the shells and not myself, and not burn everything down?