Metro columnist Bill Torpy is writing this week about an incident in which some goober with a pickup truck and a fire extinguisher drew abreast of two cyclists on a rural road and sprayed them both with the fire extinguisher. The two were on a 100-mile charity ride.

Relations between drivers and cyclists are tense at the best of times. So what are the rules? Try our quiz. (It was vetted by Bruce Hagen, an attorney with Georgia Bike Law, which specializes in representing people injured in bike accidents.)