A/N: Shorter chapterI know but the next one is longer.

A week had passed without any pranks from Sara and Grissom, though they kept a close eye on each other.

"Coffee?" Sara asked Grissom as she poured herself a cup.

"Sure."

"Sugar's on the table," she said after handing him a cup.

He grabbed the sugar and stopped right before he poured it in his cup. He unscrewed the cap, licked his finger and put some of the sugar on it. Tasting it he realized that, in fact, it was sugar and not salt.

Sara rolled her eyes. 'Does he really think I'd pull that? He should be so lucky,' she thought with an evil smile.

"So are you going to follow up with Brass tonight?" she asked him.

"Yeh, if you don't mind processing here at the lab."

"No problem," she said. "Catch up with you later." She smiled and left the room.

Grabbing the clear fishing line she had put in her locker she headed to Grissom's office.

The day she had called Greg he had already had this idea ready, which made her wonder how much thought he had really put into this.

She tied a string to the phone, one to the pencil holder, one to a pop up post-it holder and one more to his black leather address book. Then she took one last piece and tied all the ends together and tied one more string that conected everything tothe end of one of the legs of his chair.

She smiled at her lovely work and briefly wondered if she had gone too far. Shaking the thought away she quietly left and nearly got run over by a speed-walking Catherine.

"Ah! Sorry," Sara said.

Catherine smiled and stared to walk away then stopped mid-step. "Hey, what were you doing in Grissom's office?"

"Uh," Sara searched for an excuse, "just looking for him," she said lamely.

'Another prank,' Catherine thought. She wasn't as clueless as they all thought, and quite frankly she was getting fed up with all the nonsense going around. "Right," she said and took off down the hallway again.

'Close one,' Sara thought. 'I better get some work done.'

Sara actually managed to get a lot done that night. She called some window manufacturers for information, processed the victims clothes, checked with DNA and was running back round checks on some of the suspects.

"I am so fed up with these people!" Grissom said from the doorway.

"Why?" Sara asked without taking her eyes off the computer screen.

"They are all telling different stories and somehow all skating around the truth."

"I had more luck here," she said and filled him in on what she had done all day.

"Alright. I'm going to go to my office and see if I can make sense of these phone records," he said and set off for his office.

'I'm so fed up with people giving me bullshit!' he thought as he rubbed away the start of a migraine and yanked out his chair forcefully with his other hand. Items from his desk went flying towards him, his pencil holder scattering a variety of writing implements around the room, and his address book hitting him in the gut. He noticed the phone and something else go flying to the floor with a loud crash.

He didn't know why but as soon as he got over the shock he found himself laughing hysterically. 'Good one Sara,' he thought as Catherine appeared in his doorway.

She arched a brow. "What are you doing? You know what, forget it," she held up a hand."I don't need to know," she said and remembered the reason why she had come there in the first place. "I need your help with something."

"What is it?" he said, still smiling.

"Experiment," she said.

Grissom got up and followed her out, not even bothering to out his phone back on the desk.