Each chapter is between 300 and 400 words. It was a little wager I had with myself to see how well I did with constraints. I also made myself use 5 words, chosen at random by a friend using my dictionary, in each chapter.

He knew he was playing with fire. He knew the consequences of his actions. His behavior was likely to result in Penny punching him in the throat. But he just couldn't help it! She looked so silly! Sheldon clutched at his sides as tears of mirth poured down his face. Penny's expression became thunderous as she clawed the horrid goo from her face.

"You think this is funny?" she hissed angrily.

The lobby door opened and Penny gritted her teeth as her humiliation was complete. Leonard, Howard, Bernadette, Amy, Raj, and her date, Warren, walked in as a group. Everyone froze at the scene in front of them. Sheldon was leaning against the stairwell wall, a plastic bowl at his feet. Penny was standing a foot away, her hair, face and chest covered in an oozing lavender substance.

Bernadette looked at Penny worriedly. "Are you okay? What happened?"

Penny flung a hand toward Sheldon who "eeped" and dodged the glob that flew his way. "Dr. Demento here dumped his… whatever the hell this stuff is, on me!" she shrieked.

Sheldon stood straight and glared at Penny. "Excuse me, but you ran into me! I was taking my plant serum out to the back shed when you come bounding into the building without any consideration for right of way!"

Penny growled loudly. "No, I didn't! You just didn't see me because you were too busy hopping down the stairs like a moron naming off elements!"

Sheldon looked down his nose at her, refusing to take any blame for what had happened. "Stars," he corrected. "You ran into me. Therefore the accident is your fault. You owe me one gallon of plant food."

From the corner of her eye Penny saw Warren back out of the building. It was the final straw in what was possibly the worst day of her life. She clenched her fists, took a step forward and punched Sheldon in the mouth.

Random words : Goo, plastic, straw, mirth, therefore.