When the flying Mighty Jack ship lowers its nose to return to the ocean the clouds in the background also make the same movement.
When rockets are fired from the submerged Mighty Jack, the sound effect is that of rockets firing into the sky, not that of torpedoes being launched under water. Upon their detonation we also hear explosions that one would only hear in the open air. The sound of the laser cannon being fired and subsequent explosions continue this sound error.