Arbitrary region Memes

That moment in calculus or physics when your professor needs to illustrate an arbitrary region for an integral and suddenly transforms into a Pokémon artist! The blob they draw is always this amorphous, smiley blob that would make Ditto proud. No matter how complex the mathematical concept, the region somehow manages to look like it's ready to transform into whatever shape the next equation requires. Integration by parts? Sure, just integrate over this happy purple blob that's clearly enjoying math more than the students!