ShortLaughLabs on Instagram: "The Big Bang Theory In this hilarious scene, Sheldon introduces his guest, Dr. Plimpton (a world-renowned physicist), to Penny. While Penny tries to be polite, Sheldon can't help but "helpfully" point out that Penny is just a waitress who doesn't understand how gas tanks or internal combustion engines work. It’s the ultimate Sheldon moment—intellectually brilliant but socially brutal. #thebigbangtheory #sheldoncooper #sitcomclips #funnyreels #tbbt sheldonmemes comed