"Oh, there's no PROBLEM," Aquaman says cheerfully as he jumps after the doppelganger, reaching out to grab it once more, "it's just that MY REFLECTION CLIMBED OUT OF THE MIRROR TO DO BATTLE!" He is in no way, shape, or form alarmed by that occurrence--it is simply a thing that has happened in the course of this adventure, and now it must be dealt with. "The work of MIRROR MASTER, no doubt! Get to cover, chum, and I'll have this handled in just a bit!"