'Deck the Halls'

This was pretty boring. You were here for... well excitement and chicks and shit. Not old men in dusty offices. You turn to open the door and exit.

"And where are you going?" the bespectacled man queried as you tried to leave.

"Uh... I uh... gotta go see a guy about a thing." You shrug dismissively as you turn the handle on the door and step out as you continue talking to the doctor. "I'll uh, catch you arou-OUCH!"

You recoil and fall flat on your ass. You look up at the doorway - it leads into a solid brick wall! A small thin trickle of blood falls steadily from your nose - shit, you may have busted your nose walking directly into the wall. You get to your feet quickly and inspect the wall closely.

How was this possible? You literally JUST came through this door and now it leads into a solid brick wall. How?

"Ahem, I may be able to shed some light - you did not construct the hallway before you opened the door." says the doctor as he shuffles a few papers around his desk.

"What?" you ask in genuine confusion.

The doctor rolls his eyes and peers at you over the rim of his glasses. "You did not build the hallway before you tried to leave my office." He searches your face for understanding before shrugging in defeat and getting up quickly from his chair. He strides over to you... weird, he made it to you in less than a single step - but his desk was at least 20 feet away. What the hell was going on?

"You'll understand the longer you're here John. But for now - here I'll open the door for you." He shuts the door to the walled-up bricks. Before slowly turning the handle again and neatly opening the door with barely the slightest whine of the hinges. You look again at the doorway - impossible! It's... it's the hallway! But there was literally a brick wall there just seconds ago! You scratch your head at this bizarre magic trick before stepping over to the door to test it. Your foot steps outside the threshold of the door frame and soon, so does the rest of you. Incredible!

"Thank you for visiting John, have a nice day." the doctor adds with a tinge of finality in his voice before closing the door behind him.

"Wait! How did you do-" the door slams closed before you can finish your sentence. You tug at the door hoping to get an answer. But it's wrong. It's all wrong.

This is not the same door to Carl's office. In front of you is...