Hey, guys, remember that part in The Sorcerer's Stone when Harry and Hermione use the Invisibility cloak to sneak to the top of the Astronomy tower and deliver Norbert the dragon to Charlie Weasley? And then they overhear Malfoy getting detention from McGonagall for  trying to catch them at it? And then they're all like, "Oh MAN, we are the SMARTEST, SAVVIEST CATS ON THE BLOCK!" and do loads of fist bumps on the way back to their rooms, and then Filch basically just kills them because THEY FORGOT THE INVISIBILITY CLOAK AT THE TOP OF THE TOWER?