Dib and Gaz sat on the couch, watching TV. She payed close attention to the TV show and disregarded Dib's rule.

Since the attack, Dib's OCD had worsened. He set very strict rules on the couch: if you eat, wipe off the crumbs, stay on your cushion of the couch and don't come onto his, don't put your feet on the couch with shoes on, that kind of thing (of course, Professor Membrane liked the rules; the cleaner the couch, the better). The only one who was allowed to break the "cushion" rule was his father– Dib liked to cuddle up to Professor Membrane when they were watching the TV.
Well, it seemed that Gaz, who the rule applied to, might have let her bottom touch Dib's cushion. Dib looked over. His hands began to swear.
"Gaz, dear," he said sweetly. Gaz gulped. Dib only put "dear" after your name if he was mad at you. Except if he was REALLY mad. Then he'd yell at you.
"Some people don't LIKE it when their siblings CUDDLE too close." Extra venom dripped from the words "like" and "cuddle".
"I'm sorry, Dib!" She scooted to the middle of her cushion. "This better?"
"Yes, much," Dib said, smiling. Gaz sighed in relief. That's how Dib was these days. If you get him mad, he'd either forgive you immediately or throw a short tantrum and then stay mad the whole day.

Professor Membrane came home.

Dib immediately sprung up.

"Dad! You're home!" He hugged Professor Membrane around the waist. But due to his poor physical condition, his legs gave way and he fell. It was as if they were paralyzed. The scene of Zim's attack flashed through his mind once more.
"Dad! Dad!" He shook.
"Son… can you move your legs?" Dib shook his head. Professor Membrane helped him up.
"It was all in your mind. Here, stand now." Dib was still shaking.
"Dad, please promise me you'll always be there."
"Of course! Why would you think I wouldn't, Son?" Dib paused. He looked down sadly at the floor.
"Son? Are you alright?"
Dib said nothing. He just walked up the stairs, walked into his room, and closed the door.
Professor Membrane ran up the stairs. He pounded on the door.
"Please leave," came the soft reply.
"Son, I'd like to talk to you." Dib opened the door slowly. His eyes were red from the tears he was crying.
"What?"
"Why did you leave so abruptly?" Out of nowhere, within the truth that had been building up in Dib since the attack, the reply released itself.
"I want to die!" Professor Membrane stood there, awestruck.
"Why, Son?"
"Because! Why do I need to live on this planet anymore if I'm just gonna screw things up?" He yelled. "Plus, Heaven is a way better place for me–"
"Now Son, there is no heaven. There is no god. No hell. No Satan." Anger snapped in Dib's eyes.
"That's what YOU believe!" Dib screamed. He'd lost all control.
"GET OUT OF HERE, YOU STUPID ATHEIST!" Professor Membrane had made the conclusion that Dib had gone completely mad. He threw a large textbook at the Professor's head.
"TAKE YOUR STUPID SCIENCE AND GET OUT!" He picked up his laptop.
"I WILL THROW THIS PIECE OF JUNK AT YOU IF YOU DON'T LEAVE NOW!"
"Son, you've given me no choice but to sedate you." He took out a dart and threw it at Dib. It hit Dib squarely in the arm. Dib struggled, and at the same time, tears were pouring down his face. When you're a paranormal investigator, you believe in heaven, hell, Satan, God, and all that stuff. But not when you're a world-famous scientist and you run on logic.
But this wasn't the only thing that made him cry. The fact that his own father had sedated him like an animal… he could've pinned him down and used a syringe, but instead he threw a dart into his arm. Like Dib was game.

So this is how you sedate an insane person, Dib thought as his world faded to black.

"In life, unlike chess, the game continues after checkmate."

-Isaac Asimov

Sorry if I offended people with this whole religion thing. It was a good excuse to make Dib snap. I'd think he'd believe in this stud because paranormal investigators work with this stuff a lot, especially when it comes to ghosts. And Membrane's atheism is self-explanatory.
I'm not going to tell anyone if I'm religious or not (although I probably listed it in my bio like the idiot I am) to avoid argument. But literally, this was not meant to offend ANYONE in ANY way.
If, however, push comes to shove and it does cause too much of a religious vs. atheism conflict, I'll remove the chapter and change it completely. Like I said, the only reason I wrote that part is to make Dib go insane, since this story is getting a bit dull…