Don't remember them all or the names of the episodes but here's a few: The one about shrinkage, already mentioned, was hysterical. Actually tried to explain that one to my better half, didn't work, and she still thinks I'm crazy. Soup Nazi. No soup for you. Oh, and the one where Elaine doesn't know she's a really bad dancer.
They really must have had a blast over the years making this show. The bloopers are great too. I think I read that Jerry made around $80 million last year on royalties from syndication.
"I hate this thing, and this is what I'm doing with it!" (Elaine, as she throws George's toupee out the window).