"Nothing behind the mirrors," Kara said then, looking around, "and we might be able to go around this, but we risk opening you to fire."

Clark glanced at Jim, then Kara, and finally at the hallway.

"Jim, can you walk through the light beams? They don't look like they're strong enough to cause harm to a human. It might be easiest to split up for a few moments; we can rejoin you on the other side by tracking your heartbeat."