"I... can't," said Jon. "Remember when I came back here and called for Mom? She should be here."
"Maybe she went out," said Crystal.
"Is anyone at your place?" asked Jon.
Crystal wasn't in the best condition for thinking, but she managed to say "No." At least Jon thought it was a "No."
"I mean, is anyone going to be home soon?"
"Naaaaah... Forget that. Let's do it now! I'm sure your folks won't mind."
"I wish we were back at your home," said Jon. As they appeared elsewhere and Crystal looked around in shock, Jon belatedly realized that even in Crystal's condition, explaining away a teleport may be hard. He could claim it was the pot, but he wasn't sure she'd believe it. He didn't even know if pot causes hallucinations. "I wish you'd forget we got here magically," said Jon.
But then, Jon looked around. He was in a girl's room, but something seemed wrong... Posters of some musical group he'd never heard of, an old black and white Gameboy lying around, a... Wait a minute! He spotted a calendar, which made the problem very obvious. It was almost eighteen years ago!