They left Jon's bedroom and went downstairs. Unknown to them, however, the door to Zoe's room opened and she emerged. "Mental gun, eh?" she whispered, then followed Jon and Karyn down the stairs.
When they entered the living room, Zoe made her move. In one swoop, she snatched the mental gun and fired it at both Jon and Karyn.
"Whoa, this is weird," Jon said, touching his body.
"Yeah, totally," Karyn agreed.
They both had the mind of Zoe.