Dealer - Purveyor
I work on the railroad and often work near the thermite crew they use a mold and the magnesium flare /aluminum/steel powder and melt the rails together at about 3000 degrees . A crew in BC canada would toss some slag leftover over the side of a bridge that was 60 ft to the water. Needless to say the slag would explode on impact and one time to many sent the then hardened shrapnel back into one of the workers head killing him instantly. The guys told me if it starts raining when they have just lite a fuse they say run for cover cuzz its going to explode burning slag all over the place for hundreds of yards .Very dangerous stuff.