What, that's all? Seriously?

Jon braced himself. He was certain he was about to see his friend being burned to a cinder, a finger of God reaching down from heaven for her intransigence.
Instead, nothing happened.
Her eyes snapped open. She dropped the rock upon the ground, met Jon's waiting gaze for a few seconds, and then took a quick gander around the room.
And then suddenly she began to laugh.
"What is it?" Jon wanted to know.
Karyn just laughed harder. She fell to the ground, laughing insanely, tears rolling down her face. She was gasping for breath; Jon was worried she might choke from laughing as hard as she did, but after a while she managed to regain her composure.
"Seriously?" She called out to everyone and no one. "*Seriously?!*That's what it's all about? That's retarded!"
"What IS it!?" Jon demanded again.
"Ooh!" Karyn replied; "Caps lock, italics, and an extra exclamation point! You must seriously want to know what's going on."
"What the HELL are you talking about!?"
"There you go again!" Karyn said with a laugh.
"Jon:" Karyn said. "I want you to look around your room."
"What? Why?"
"Just do it."
Jon shrugged his shoulders in frustration and looked slowly around his room. Everything seemed in order; his computer, a two-year-old Macintosh, was sitting upon his desk; nearly a hundred of his CDs were sitting in a rack in the corner, and his dirty laundry was spread as a haphazard mess around the room, save for a "buffer zone" of about a foot and a half around his bed. "Nothing out of the ordinary," he said.
"Oh yeah?" Replied Karyn. "What if I were to tell you that none of that stuff...your computer, your CDs, your dirty laundry or your bed... none of it existed until you looked around your room just now?"
"Bullshit!" Jon spat.
"Oh yeah?" asked Karyn. "Tell me Jon, were there any posters on the walls?"
Jon squinted, perplexed. He couldn't seem to recall!
"What about all those CDs? What albums do you own, Jon? What artists?"
"I..." Jon began. "I... don't know."
"Of course you don't!" said Karyn delightedly. "Because that information doesn't exist yet!"
"What do you mean, it doesn't exist yet?"
"I mean that the narrator hasn't said whether you have posters on your wall, or what exactly is in your CD collection!"
"Narrator?"
"He hasn't said alot of other things yet either, Jon! Like for example: what's your mother's name? Do you have a sister?"
Jon clutched his head in both hands.
"WHAT's HAPPENING TO ME!??" he moaned.