I thought the reason they made C-4 non flammable was because it made it safer and more effective? I suppose it would be hard to get that kind of science going in the dust though... Now I'm really hoping for a scene where our friendly neighborhood Flame princess blows up the whole squad with their own bombs :p
Flame Princess sneezes, a small ember burns through Jon's fragmentation grenade, grenade blows Jon in half, tearing through the safety case around his explosives, igniting the immediate area in a huge inferno of death and destruction, causing a chain reaction of doom.