"Don't know yet," Tony admitted, though he didn't seem too bothered by it, or the slow ascension of his wounded team. He would feel disgustingly guilty about the possible crippling of an arguably respectable scholar later, but right then he was feeling the energy that had diminished as they descended come back with an extra thrill of excitement for whatever they were going to land on. Whatever it was, it couldn't seem to leech like it had been doing through Sue's bubble. "How long can you keep that up?" he had to ask. Without the force field they would be in the dark again, and Tony wasn't sure how much further they could go without the illumination. If it was some spooky clubhouse in the center of the earth, the dead obviously didn't appreciate the wonders of a couple of lamps, and Tony had always kind of been a nightlight kind of a guy. Not that anyone except his mother had to know that.