"Yeah, I'm not, uh. Real interested in swimming." This is a complete understatement. Marc is so averse to swimming that the thought makes him want to punch the wall. Or this rude but still helpful bystander. "They couldn't, I don't know, make a regular stairway?" Marc grouses, starting down the tunnel again towards the exit. "If this is a usual thing, people having to go through here, you'd think they'd make it easier to do."