I was inspired by seeing a video Alan Rickman sucking in helium on the Jimmy Fallon show and wrote this as a result. I made this rather quickly so sorry for the typos or anything like that.Hope you enjoy!

Disclaimer: This is not written by JK Rowling

Fred rubbed his hands together. "This is going to be-"

"-wicked" George interrupted, grinning as they looked up at the Head Table to see their absolutely beloved Potions Master.

"Snape isn't going to what hit him!" Fred said gleefully, raising his voice just enough that the nearby Gryffindors turned to them warily, as if knowing they were up to something.

Mind you, they were the Weasley twins, they were always up to something.

"Shh. Keep your voice down, do you want the whole world to know?" George hissed, glancing at the fellow Gryffindors and giving them a cheeky smile before looking back at Fred.

"You know the plan right?" George asked.

"Inside and out" Fred replied with a grin. "Now all we do is wait."

2ndYear Potions

"The Polyjuice Potion, which is a complex and time-consuming concoction, is best left to highly skilled witches and wizard, unlike you incompetent fools," Snape said, curling his lip as he glared at the Weasley twins as always.

Fred rolled his eyes like he normally did in the class and looked at George.

"You ready?"

In response, George slowly got out his wand and pointed it at Snape and muttered, "Vocemutare."

A gas nearly invisible left George's wand and entered Snape's mouth as he talked.

"It enables the cONSUMER-" Snape stopped abruptly, putting his hands to his mouth. He opened his mouth and tried again. "to assume-" Snape tried to say in his usual heavy voice. But what came out of his mouth did not sound like him at all. His voice had suddenly gotten higher and almost falsetto sounding.

The whole class looked at him once before bursting into laughter. He angrily turned to Fred and George, and said "WEASLEYS!" as harshly as he could but what came out was a squeaky voice that wasn't scary at all.

Fred was on the floor laughing and George was crying from laughing so hard. "Maybe now people will actually listen to you, Professor!" said George cheekily as Fred and he ran out the door of the dungeon.

"Let's do it again!" George said after running as far as they could. "We'll do it on the next person who turns the corner."

Sure enough, they heard footsteps and as the person turned the corner Fred muttered the spell.

"FRED AND GEORGE WEASLEY!"

"Shit, it's McGonagall, RUN!"