Quote from George in The Bubble Boy
Mrs. Sanger: This is Donald. George: Hi. Susan Ross: Hello. Donald: [o.s.] Who are you? Where's Seinfeld? Mrs. Sanger: He's on his way. These are his friends. Donald: What are you looking at? You never seen a kid in a bubble before? George: Of course I have. Come on. My cousin's in a bubble. My friend Jeffrey's, uh, sister, also ... bubble. You know, I got a lot of bubble experience. Come on.