It's hard to communicate between bike and car. [MENTION=137127]Papa Tom[/MENTION], it's possible the guy didn't hear you, and it's even possible he thought you were saying something nasty. Or his effort didn't allow him to respond. And as [MENTION=190364]lostarchitect[/MENTION] says, stuff can be misinterpreted but either as nicer as intended or less nice. I had some rowdy 20-somethings yell at me from a car. There were four in the car, and it was Saturday night, so you get the picture. We stopped beside each other at a light, and I asked them what they were saying. One said, "We said we love your muscles." And either they thought I was some doofus riding a bike or I was a cool dude. I decided to take it in the best light possible and laughed loudly and waved back to them.