What was troubling Peter more than being trapped in this room was being trapped with someone who looked extremely nervous and fidgety. If this Conrad guy had claustrophobia, they were in for an uncomfortable time. Also, from how he was attempting to avoid showing his mouth, Peter knew there was something even more suspicious going on.

"I was, once or twice." He's also been trapped in death games by psycho villains, which was kind of the same thing. "Hell's a whole different beast, though. Who knows what the rules would be." Maybe they did have to wait until they teleported again, since there was no other visible way out.