I was thinking there could be some technique in creating an explosion with fire, that doesn't seem so far-fetched to me. I'm not really sure what the restrictions are, but I'd imagine fireballs are something elementalists could do. If thats the case, only one step further would be necessary to make an explosion, creating a volatile source of energy within that fireball. That might be out of an elementalists skill-set, which is fair, and that's why I asked.