"Hurry up 'fore Filch gets back. We're lucky he left us alone in the first place."
"He's off chasing Peeves. We have at least enough time to find somethin' good," replies Fred who was digging through one of Filch's many drawers of confiscated items. Then, the bitter stomps and angry mumbles that could be coming only from Filch were heard echoing down the hall.
"Quick just pick anything," George yelled sort of hushed. Fred grabbed the first thing his hand touched and shut the drawer as fast as he could. Filch was too busy muttering something about Peeves and exploding toilet pipes to notice as Fred finished stuffing the stolen goods into his pocket.
"Now, I'm absolutely 100% sure you two are guilty of setting those explosives off in the corridor However, Headmaster Dumbledore thinks that without proof I can't punish you for it. Get outta here 'fore I change my mind and decide to just go against his orders. I remember the days when students could be hung upside down by their toes without the Headmaster's approval. Dumbledore doesn't believe in such harsh punishments no matter what it is the student did," he continued. Fred and George were already gone.
"Say what did end up getting from that drawer?" George asked. Fred looked over his shoulder to make sure no professors were around before smoothly pulling it out of his pocket. "That looks like it's just a normal piece of parchment you git. After all that trouble we didn't even end up with anything good."
"Well, If it was confiscated by Filch it must be something special," replied Fred.
Later that night while sitting by the fire in the common room, Fred and George decided to further investigate the paper. George jokingly tapped it with his wand and said, "We just want'ta use you to cause trouble. Can't you do anything useful?" Then, to their surprise, words appeared on the map. "We'd love to help you, but you need to say the magic words."
"Well then what are the bloody magic words." Fred questioned, full of curiosity. If we just told you, we wouldn't know for sure you can be trusted. "Okay well what if we promise that all we want to use you for is pulling jokes?" You have to actually say it.
Both twins, unsure of what exactly to do, touched the map with their wands and said, " I solemnly swear that I am up to no good."