Lefty the Salesman sells Ernie some air, but when Ernie waves to Bert, wanting to show it to him, he drops it. According to Bert (who didn't know what Ernie had), "It couldn't have vanished into thin air." But Ernie sobs, "Yes, it could, Bert! It could!" (EKA: Folge 0049)
At a library, Cookie Monster asks an Anything Muppet librarian for a box of cookies. The librarian becomes extremely frustrated because Cookie Monster doesn't understand the library doesn't have cookies!
Ernie and Bert have pizza and grape juice. Bert complains that Ernie has more of each, so Ernie tries to make it even by eating some of his pizza and drinking some of his grape juice, but then Bert has more. And so on. (EKA: Folge 0534)