Here I demonstrate just how powerful Potassium Persulfate flash powder is. One on land and then an epic one in the water. It is a 2:1 mix of K2S2O8 and MgAl. The Magnalium (MgAl) is 50:50 mix of about 200 mesh Mg and 3 micron German Dark Al powder. If you do not know what you are doing, then please save yourself an arm and us who know what we are doing from even stricter laws against these types of things! Stupid people ruin it for us all. Note that I am in a well wooded area away from people... Don't set these off by people, buildings, cars, ect.