"What about really quick homemade grenades? I've heard that using pretty much any aerosol can, you can just use duct tape to hold the sprayer down and use a lighter(stick lighter preferably) to light the stream. Then throw the can and the fire should run up the stream and into the can, causing a quick and diversionary explosion. That said I do see the danger, hold it too long and it kills or burns you, you could light the aerosol in the air if your not careful, and you could easily light something or someone else on fire if you aren't very cautious."