Tony must have been very distracted by his hunt for the last thing he wanted to see, because he could only answer, "Leeches...?" He was sure he could hear something now, though, making him stop and go dim to listen, and only hear the echo of the water deeper in the tunnel. When he slithered further ahead, sliding his tail along the wall to send sparks up the stone, he was sure it was there again, and he held his breath this time.