Jon gestured to the boobs and blonde hair she'd accidentally given herself, "Oh really, because you've been so good at it so far!"
"Jesus Jon, you always think you know best," Karyn complained. "Like you've ever had to make an important decision!"
"I make important decisions all the time," Jon yelled. Even if that wasn't really true, he was getting angry at this point, "My life's pretty complicated!"
"Well guess what, it's not always that easy being me either. God, I wish you'd lived my life and could see what I was talking about!" Karyn had one moment for eyes to widen in shock before the flash of white light overtook the pair.
When it cleared, Karyn was the only one remaining in the room...but she and the room were different.
Jon suddenly found himself elsewhere... "What do you think?" The girl in front of him asked.
He looked at her blankly, still disoriented. "What?"