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Sheldon: I don't understand why you're not enjoying this. Together, in this car, with my enhanced capabilities, we're like 'Knight Rider.' Leonard: Except, in Knight Rider, the car isn't a yammering sphincter. Sheldon: You mock the sphincter, but, the sphincter is a class of muscle without which human beings couldn't survive. There are over 50 different sphincters in the human body. How many can you name? Leonard: I was wrong. This is exactly like Knight Rider