Suddenly, both of them blinked and momentarily became confused.
"Sarah, something's wrong. Your clothes are different. And so are mine," Biff said, in a moment of clarity.
Sarah looked down at herself and saw that Biff was right. She was wearing clothes that obviously belonged to a guy - a gray muscle shirt, blue jeans, and sneakers. Upon further examination, she realized that she wasn't even wearing a bra!
"You're right," Sarah said, her eyes wide. "How did this happen?"
"I don't know, but ..." Biff started, but then became confused again. "What do you mean there's something wrong with your clothes? That's the same outfit you wore at school today. Now come on. I know you don't like shopping, but I do. And there's a sale at Victoria's Secret that I just can't miss. They have a bra and panty set that'll just drive you wild ... after our date tonight," he said, with a smile.
Sarah was still bewildered, not quite understanding what was going on, but went with Biff anyway.