Edward place a bucket of water on top of the vent that was mechanically timed to open in approximately an hour. One of Winry's creations that Ed had gotten her to make for 'unknown purposes'. He gave a signal to his partner in crime, Jean Havoc, to tell him that the bucket was in place. The reason this bucket was here was the smallest part of the prank. After he had thoroughly soaked the Colonel, he assumed Roy Mustang would march out of his office. Afterwards, a sack of wheat flour would fall on him - dropped by Edward - to blur his vision for the last phase of the plan. After that, Jean would use his rather large slingshot to shoot a pie at the now very coated Colonel. Of course he would be suspecting Edward for it all, but he had no proof, did he? Riza had come to work, but they planned ahead of that and set this up for when she went on her 15 minute Wednesday lunch break. Short, right? After everything was set up, and the pie smothered in whipped cream, the two subordinates acted like they were never doing anything suspicious, continuing their paperwork they had worked ahead on for this special day.

-Skip-

Havoc yawned, and then rubbed his eyebrow, signaling Edward that Riza was at least eating and gone by now, probably at her favorite restaurant. Edward happily nodded, evil grin on his face, and climbed into the vents where his sack of flour was waiting for him.

Five.

Four.

Three.

Two.

One.

Splash! Mustang was mad enough to have evaporated the water without the snap of his fingers. He immediately raced outside, causing Edward to drop the sack accidentally. Either way, he was still all flour-ey, whether the sack was dropped or not. Roy uncovered his eyes with his fingers and tried to look up, only to be shot down by a cherry pie, which happened to be old. While the Colonel was down, Edward quickly dropped from the vent and literally hopped to his office, trying not to let his automail hit the floor. The commanding officer of both the pranksters was furious, sitting up and clearing his face once more, using his arms to cover his face in fear of another flying pie. He still couldn't see, so he didn't notice Havoc also running back to his office. "WHO THE HELL DID THIS!?" As if on cue, Riza walked through the doors and stood in front of the Colonel, being the first one he saw. "Hawkeye. Did you see anyone? I bet this was Edward..." He trailed off, getting up, walking to and kicking in the Alchemist's door. "I know this was you!" He yelled, attempting to snap his fingers and burn something that was in the room, but failing because of the lack of cleanliness of his gloves.

"Mustang, with all due respect, you look like a clown. Yes, you caught me." The blonde said, slowly pulling out a cupcake he had in his drawer just in case this happened. He threw it, attempting to not hit Roy but did instead. Oh well, must be in his blood to do that.

Obviously, Roy couldn't really do that much because he technically wasn't allowed to, but he did a manage to scrape some of the icing off his face and throw it at Edward before going back into his office and realizing his paperwork was all destroyed.

Just maybe this was a good thing after all.