"I'm a nun ... me," Tiffany said. "And no one notices anything is wrong. How can they not see it?"
"I think the more important question is how are we noticing it right now," Biff said.
Tiffany realized that he (she?) was right. Ever since finding themselves in the park, they had been slowly transforming into these other people, losing their own identities and memories along the way. But now, all of a sudden, they remembered who they really were. Why?
"I didn't remember who I was until I saw you," Biff said.
"No. It was when we looked at each other," Tiffany corrected him. "Maybe that's it. Maybe that's why we remember."
"Because we looked at each other?"
"Do you have a better theory?" Tiffany asked.
"No, not really." Biff paused, looking Tiffany up and down. "Man, I can't believe that you're actually a nun, of all the people to be."
"You have no idea. This is almost, like, the opposite of me."
"So what do we do?" Biff asked, getting back to the matter at hand.