Percy did not at all have time to try to analyze this new development, as he had abruptly found himself divested of his wand, and had his hands wrenched rather painfully behind his back. Before he could properly wonder where that voice was coming from (the voice of Voldemort? from where?), he had been shoved rather unceremoniously in front of the great clawfooted Mirror that stood behind Quirrell. Percy frankly had no idea why he'd felt the need to give the Mirror a capital letter in his mind, it just seemed like the sort of artifact that deserved a capital letter. "Look into the Mirror, boy!" snapped Quirrell.