If it was in the background, it wouldn't matter if it had a radius impact or not. Anyways, it would be nice to have "emitter" explosions. Then you could make events to trigger the emitter on and off, and give it a short duration in order to have the visuals of an explosion, but really be just an emitter.
However, it would be nice if someone could make more than just one, but a pack of emitter explosions. Yes?