When I was nine, there was a teevee show called The Greatest American Hero. In this show, aliens come down and give a schoolteacher a suit like a Superman or Captain Marvel get-up, which gives him superpowers. (Only when wearing the suit.) However, he loses the instructions, and thus our hero is unable to use the suit to its full potential. For instance, when he flies, he doesn't do so in a Christopher Reeve-like graceful straight line or in elegant swoops as he woos Margot Kidder. No, he caroms about, flailing his arms and crashing into stuff. Fun show, if you were 9 in 1980. As I was.
Anyhow, the show had a theme song that's pretty familiar to anyone from that time period:
Greatest American Hero went off the air in 1983, and that was that, although you'd still hear the song once in a while, and it later turned up in, among other places, as a parody in an episode of Seinfeld, wherein George Costanza used the song with his own lyrics as his answering machine's outgoing message.
Now. As I said, Greatest American Hero last aired on February 3, 1983. This episode of Seinfeld aired Fabruary 13, 1997 -- a little over fourteen years after Hero ended. And next month, it'll be seventeen years since the Seinfeld episode aired! There's something interesting about a pop-culture reference being almost two decades old, especially when the thing the reference was referring was more than a decade passed at the time it was made.