There are quite a few "courteous drivers" around here.

Technically a car is supposed to stop for a pedestrian that is stepping into the road... or looks like they will. So, some also stop for bikes at odd places.

Occasionally some drunks will roll down a window and yell something, but with slurred speech, the Doppler effect, and road noise, I rarely have any idea what they're saying. And that is just fine. I can only imagine it is some kind of encouragement.