A lot of the conversations I have with people work this way:

And when you're that kid, you have this conversation that goes "Oh my God, I just saw the most amazing thing!" And you start to explain, and the person you're explaining it to, their eyes go blank. And you go, "Okay, wait a second. You know there's this thing called the Internet, right? On the Internet, there are these things called web pages…" And you go back and back and back until you reach some point where you can communicate it. And you know, if you're talking to a friend or colleague, sometimes they will hear you out, and sometimes they will even catch your excitement.

Great Cory Doctorow interview on AVCLub