[1] In this episode, on the way to Susan's family cabin, the cast visits a youth who lives in quarantine due to an immune deficiency.
In the coffee shop, a man tells Jerry and Elaine about his son Donald, who lives in a plastic "bubble" which creates a germ-free sterile environment.
On the trip, exhilarated by the light traffic and the resulting chance to make excellent time, George drives at top speed, leaving Jerry and Elaine behind.
Irritated by Donald's taunting and condescension during the game, George disputes the answer to the question: "Who invaded Spain in the 8th century?"
Having previously irked her after privately likening her laugh to that of "Elmer Fudd sitting on a juicer", she calls out of the trip but quickly changes her mind.
This was the first malware of its kind, having been able to activate itself (via an embedded Visual Basic script) upon the recipient opening the e-mail contents, as opposed to running an attachment.