By the fourth night, everyone was paranoid. Whoever was doing the practical joking was doing it well. Nobody could figure out who it was, or catch him or her in the act. Catherine stomped into the break room about halfway through shift. Warrick and Nick started laughing.

"Styrofoam peanuts! How in the hell does someone get enough Styrofoam peanuts to fill an SUV? I'm with you Nick; somebody needs a good butt kicking."

Sara walked in and caught the end of Catherine's comment. "What happened this time?"

Warrick answered through his laughter. "They filled her truck with foam peanuts."

Sara snickered. Nick looked at her and smiled. "You know that means you are next."

"What?"

"Well, we've all been had twice; you only had the hole in your cup. You're up for the next big one."

"Not true Nick. Greg and Grissom only had one each, it might be their turn."

"Whose turn for what?" Gil asked from the doorway. They all looked at him and smiled.

"What?"

Sara spoke as Gil went to get a cup of coffee. "Well, Nick, Warrick, Brass and Catherine have been hit twice by our joker. That leaves Greg, you and me for the next round.

"You can narrow that down to you and Gris." They turned and looked at Greg and laughed hysterically. Gil choked on his coffee. Greg was covered in green slime, his hair matted down to his head. After he caught his breath, Nick asked Greg, "Man, what the hell happened to you? You look like a big booger!"

Greg huffed. "I don't know. I opened the door to the DNA lab and next thing I knew, I was coated in this gunk. This is WAY over the top." He pouted and left the room, leaving the rest of them laughing.

Catherine looked at Sara and Gil. "So, who's going to be next?"

Sara and Gil looked at each other in wonder. Gil shrugged it off. "I don't know and I'm not going to sit around and worry about it either."

"Nobody is going to get one past me." Sara said confidently.

"We'll see." Catherine responded with a smirk. Once more, they all went back to work wondering when the joker would strike next.

They were all jumpy for the rest of the shift. They checked their cars every ten minutes, made sure there was nothing perched above any doorframes before entering a room, and basically avoided the locker room. No one let his or her cups or pens out of sight and

jumped at any sudden noises. Towards the end of the shift, Sara was storming down the hall, soaking wet and looking very angry.

Nick and Warrick were also in the hall when they saw her coming. "Uh oh, it looks like somebody has fallen victim to the serial joker once again."

Nick tried not to laugh, and failed miserably. Gil had emerged from his office when he heard Sara yell. "Somebody is going to pay for this!"

He tried not to smile, but it was hard. "What happened?"

"That is it! Who the hell thought it would be funny to turn off the bathroom light and douse me with water?"

Laughter could be heard from the DNA lab and Sara looked to see Catherine and Greg doubled over in hysterics.

"Who did it? I'm NOT amused!"

Nick and Warrick ran down the hall laughing, in fear that Sara would kill them right there with her bare hands.

Gil tried to remain calm. "I think you should head home, shift is just about over anyway."

She glared hard at him. "Somebody is going to get it." She mumbled as she stormed down the hall towards the locker room.

Gil went in his office and closed the door. Hysterical laughter could be heard through the door.