As a lover of blowning things up, I can appreciate this pic. That said, a few suggestions. The exploding plane looks too... I dunno... rigid maybe? Almost like you took the model, shuffled some of the parts around, then stuck a couple of smokey balls on it and wrapped it in a fireball. A good place to start, but it needs to flow a little better, I think. Make the debris from the explosion jagged. I think I'd also move the other planes back in the scene a bit. The next closest plane looks like its about to run into the one that just kerblooied. Keep on it though! This pic has potential.