I have a special term for the person on the back of the tandem. CRAZY!
The person on the back has no control at all, and must have absolute faith in the ability of the driver, who controls the steering and the brakes. Some years ago I was on a group ride called Ride the Rockies (6 days totalling 361 miles across several very high mountain passes). On the last day I was descending Loveland Pass, exhilarating in the thrill of doing 56 mph (the fastest I've ever gotten my bike) when I heard a high-pitched scream behind me. Then I felt a whoosh as a tandem roared past me at a bit over 70. The scream I heard was from the stoker, a female, who repeated over and over as they rode out of sight, "I'm seeing a lawyer tomorrow. Tomorrow, do you understand me? TOMORROW!"
Apropos of nothing, I was stopped once for doing 32 mph in a 15 mph school zone. I begged the cop to give me a ticket and he refused. Said not giving me a ticket was punishment enough.
