I was out in the NSX the other day and had a guy in a Integra give me a thumbs up....at least I think it was a thumb. Hard to tell with his tinted windows. I just smiled but afterwards thought maybe he'll be posting on a thread somewhere about the stuck up NSX driver who didn't wave back. So what is the proper response? Thumbs up? Or does that mean I like his car too? What if I didn't really like his car? Or does that mean I want to race? Aside from the middle finger, which has obvious meanings, there seems to be a whole set of signals that get passed between drivers that may be misunderstood. So I thought I would ask the group. What would you have done in my situation? What signals do you use and what do they mean?