A fly by occurs when the loser basically gets his butt handed to him off the line but they feel it is necessary to demonstrate that they can drive past the speed limit. It's quite comical actually.
I had this happen to me the other day when I was driving up MN 65. This idiot in a Grand Am kept trying to race me at each stop light. I just accelerated briskly enough to always defeat him ( About 1/3 throttle) .

After about the 4th time losing, he pulls up right next to me. I hate having people on the side of me so I sped up. He sped up. I slowed down, he slowed down. It was annoying. So I gun it up to about 100 to get some distance. He tries to keep up but I wasted him, of course. He catches up and is in the right lane, I'm in left. We're approaching traffic. I speed up to pass the guy in the right lane faster since I don't like to sit in someone's blind spot anymore than I like them to sit in mine. The Grand Am guy starts speeding up, too, but I'm wondering where he intends to go being right next to me. I give it a lot more gas to clear my lane and give the Grand Am room to pass. The fool then accelerates and passes the car on the right shoulder. Did that moron think I would be impressed by his willingness to do something so stupid?

I just slammed on my brakes at the next left turn lane and turned around. I didn't wany anything more to do with this fool.
That's basically the fly by mentality. I do tend to drive faster than traffic, but that's usually just long enough to give myself some breathing room. I really can't stand people who drive in packs when they don't have to just for the sake of not exceeding the speed limit. I REALLY hate being in stop and go traffic just because some idiots at the front want to ride in packs.
Man, I could write a book on this.
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351W 89 Mustang GT Convertible
[This message has been edited by jimberg (edited 08-14-2001).]