We also probably nailed the ending too.
JOHN DOE pushes open the front door to his apartment. A ton of commercial has been piled up in front of the door. He barely makes a gap so he can squeeze in. He tosses his wet uniform hat on a cloth rack and walks tiredly over to the kitchen area.
His baggy eyes glare over at the freezer. He takes a frozen pack of disgusting microwave food out of the freezer and places the pack in the microwave oven. A commercial for Happy Coke trails along the surface of the pack. After setting the timer he grabs a warm beer from the barely working refrigerator and heads over to his TV.
He turns on the TV just in time to catch the intro to his favorite TV show. Just after the intro is done a commercial break starts. He gets a bit annoyed over this, but at the same time the microwave says that his food is done. Of course, the oven have to spew out a commercial for Happy Coke, and how tasty it would be in combination with the food.
On his way to the kitchen area he spots a huge floating commercial screen outside his window. He angrily tosses a pillow at the window before he heads for the kitchen area.
He takes the tray out of the oven, forgetting that its really hot, and burns his hands in the process.
As he cools his hands under cold water from the sink he spots the commercial screen again, floating just in front of his window. He gets really pissed at this sign, floating there with it's stupid message for Happy Pain Killers. Angrily he closes the drapes in front of the window to avoid seeing that stupid sign again.
JD takes a towel and picks up the food before he walks back to the TV. Sadly, he only catches a glimpse of the show he intended to see before a new commercial break starts. When he then sees the commercial screen coming floating up outside of his window again he snaps.
He gets up, grabs the TV, and tosses it through the window at the commercial sign. The screen of the commercial sign breaks, but the sign remains floating. A small white light builds up at the top of the commercial sign. A sudden white flash blinds JD and paralyzes him.
A HUGE GUY walks into JD's apartment and ties a strap around JD's waste. He lifts JD up and drags him out of the apartment. Bumping his head in the wall. The huge guy walks out the door, and close it behind himself.
Fade to black
Int. Mental hospital
JD's eyes slowly opens, his vision is blurry. He is in some huge white room. He can barely see the shade of a head with a mask leaning over him before he doses off again.
Fade to black
INT. JOHN DOE'S APARTMENT
JD walks happily in, doing a pirouette and slams the radio button as he walks in the door. Everything around him looks great, and the music is playing louder that ever. He struts over to the kitchen area of his wonderful apartment and takes a tasty pack of fast food out of the freezer. He places the pack in the microwave oven, sets the timer. He does a few dance moves to the tune while he waits for the food to be done.
While JD is dancing in front of the microwave the billboard comes floating once again. As he dances he hear a snapshot-sound, which makes him turn fully around to face the black screen, which momentarily generate a picture of the pose he held when the noise was heard, with a newly generated slogan. "Try Happy Treatment, and feel the difference". He smiles and salutes the sign before he starts dancing again. As the camera slowly goes backwards, you see the apartment gradually fade into a worse state than ever, and music from the radio goes from loud music to thin, awful radio-sound with JD still dancing as if it was a rave-party. The camera still goes backwards, through the kitchen window until the whole house in the shot, where you just see the sign place itself on top of the house. A futuristic city filled with advertisements in the background.