Wash was rummaging through some of the shit in his closet when he found an air horn. And it wasn't just any air horn, it was his old roommate's.
It was Maine's.
This brought back some memories from Project Freelancer. The old prank wars...

Wash was walking to his room when he came across Maine and his girlfriend, Rhode Island, outside of Arizona's room. Rhode was holding Maine's air horn, while he was holding a can of silly string.
Wash cleared his throat, causing the two to whip around in alarm.
"What are you two doing?"
"Oh, nothing much. I'm just introducing Zona to someone that I like to call 'Mr. Air Horn.' He makes a profound argument for getting up."
"You do realize that she's going to kill you two for that, right?"
"Not if she can't catch us!"
He wanted no part of this. "At least wait until I'm out of sight."
"Can do."
A few moments later, the air horn went off.
"I'M GOING TO GOUGE YOUR EYES OUT WITH A SPOON!"
"Run like a bitch!"
Maine and Rhode tore down the hall, laughing their asses off while a pissed-off Arizona chased after them, covered in silly string. Whatever kind Maine used, it was a bitch to get off; he knew from experience.

Wash, York, and Rhode were all sitting in the living room. York was reading a book, while Wash and Rhode were playing a game of Cribbage. A beat-up Wyoming walked in.
"What happened to you, Reggie?" York asked. "You look like shit."
"Well, it just so happens that someone switched my and Tex's underwear, and she thought I did it," he replied, glaring at Rhode.
"I have no idea what you're talking about. I just got back from a mission," she said, not bothering to look up. York was trying not to laugh. The brit glared at him before walking away. York burst out laughing as soon as Wyoming was out of hearing range.
"Was it really you?" Wash asked Rhode. She just grinned.
"Maybe."
This caused York to laugh even harder.

Wash was on his way to the bathroom. He stopped dead in his tracks when he was North standing outside said bathroom, trying not to laugh. North pointed to the door and said, "York's in there. Wyoming pranked him!"
This he had to see. He knocked on the door.
"Go away!"
"York, I really need to use the bathroom!"
"Fine..." He opened the door, and Wash burst out laughing. Wyoming wrote all over the Freelancer's face. There was a mustache, the words 'Wyoming was here,' and 'dumb.'
"He thought I was the one who swapped the underwear drawers."
"Wait, what?" North obviously hadn't heard about that.
"I'm so getting him back for this," York growled.
Later on at dinner, York put a laxative in Wyoming's drink. Wash had never seen the British Freelancer move so fast in his entire life.

Oh, Wash pulled his fair share of pranks, like changing Maine's armor color to a hot pink for a week, or the time he and York managed to shave North bald. He looked down at the air horn in his hand. Did it still work? Time to test it out.
It was 9 a.m., and Church was bound to be asleep. The blond crept towards his room. Light snoring could be heard. The door quietly opened a few inches, enough for a hand to stick through. He pressed down on the button.
"HOLY FUCKING SHIT!" Church fell out6 of bed in his mad scramble to get up. Wash started to crack up. He hadn't done something like this is far too long.
"You douche!" Church threw a pillow at him.
"Hey, you make it too easy!" Wash was still recovering from his laughing fit.
"Oh, it is on!"
Wash grinned. "Challenge accepted."
Let the games begin.