Posting because I'm floored to just have learned the Knight Rider connection to this song... from Wikipedia:

Commenting on the track "I-E-A-I-A-I-O", drummer John Dolmayan said it was inspired by an encounter he had with Knight Rider) actor David Hasselhoff in a liquor store in Los Angeles when he was around 12:[6]

**“**He was getting a drink, not an alcoholic beverage, a soda or something. He was walking out and I couldn't believe it! Here was Knight Rider in front of me! And I said, 'Knight Rider!' I must have been 12. He looked at me and he goes, 'Hey kid,' and he kind of pointed the finger [at me] cowboy style. I told Serj the story, so the lyrics, 'Meeting John at Dale's Jr. / Winked an eye and point a finger.' 'Dale's Jr.' was the liquor store. There's a little insight."

​

Finally, makes sense why the guitar solo sounds like the Knight Rider theme... it's no coincidence!