The strange sounds catch Nanette's attention. Try as she might, she can't quite make out the details, so she nudges Simon.
"Listen," she whispers quietly into his ear. "Do you hear something back that way?"
Simon tries to put the fight and the crowd out of his mind, and concentrates his attention toward the presses.
Simon's Perception roll 1d20 + 7 ⇒ (14) + 7 = 21