Into the magic mirror

Boys seeing her undies? Whatever was beyond the magic mirror, it couldn't possibly be worse than that. A tiny part of Susie's mind alerted her to the fact that she was making a terrible mistake, but the much larger rational part of her mind scoffed at that idea. There was no such thing as ghosts or magic mirrors. But there was such a thing as cheerleaders, such a thing as boys and definitely such a thing as underwear. Susie had some on right now, under her clothes, and she planned to keep it that way.

Grabbing Bonnie's arm, she stepped backwards into the darkness, pulling the tomboy with her. She wasn't planning to go in here alone.

Instantly, she was surrounded by darkness. It was cold, and strangely velvety, like slick damp fabric sliding over her skin. Her feet weren't planted on anything. She was floating in an infinite void, the sounds and lights of the carnival impossibly far away.

"Susie," the house whispered in her ear. "I have something horrible to tell you. There is absolutely such a thing as ghosts."