Board Thread:Wiki/@comment-5774380-20151209005524/@comment-26932251-20151212013231

I don't think it is the correct translation at all.

Thunder describes the sound caused by a lightning BOLT. In commonly accepted English, there's no such thing as a 'bolt of thunder'.

Also, a bit infruriatingy, part of the problem seems to be the illustration of the explosions themselves. There isn't enough visual information to differentiate between an explosion caused by black powder and another kind of explosion.

Also, I mean, they have cannons. No one ever compared the actions of the cannons to thunder or lightning, so I think that also clues in that there's another possibility.