Zoe's a bit surprised

As Karyn and Jon vanished, Zoe's scream cut off in surprise. She heard some footsteps running up to the door, and her mom called through, "Zoe, what's wrong in there?" "I don't know, Mom. Karyn and Jon appeared in here out of nowhere, with no clothes on, and then disappeared." "What?!? I'm opening the door." "I don't know," continued Zoe. "They were suddenly here, then they weren't. Look, they left a pile of clothes here." But at that moment...