"Hey, this tastes sour," Melissa suddenly said, handing her drink back to Gene. "Would you...?"
"Of course," Gene says with a smile. Ever the polite boyfriend, he quickly takes Melissa's drink back to the counter, though he has to stand in line again.
"Well?" Melissa asks you. You frown.
"Well, what?" you ask.
"Exactly," she says. She winks and dangles the flashlight in front of you, and you suddenly realize what must have happened.
"What did you do?" you hiss.
"Relax," Melissa said. "I already undid it. But unless you want me to do worse - and leave you that way - you're going to play my game."
"What game?" you ask warily.
"Oh, just a little fun with the flashlight," Melissa said. She points the flashlight at you. "Are you going to cooperate, or do I just erase your memories as I do it?"
It doesn't take a moment of hesitation for you to decide what to do. At least if you cooperate you'll be aware of any changes. Besides, maybe you'll have the opportunity to get the flashlight back later.
"Fine," you say. "What do you want me to do?"
"Just touch the flashlight while I work so you can see the changes," Melissa says. After you do so, she flicks the light on.