Well, I used to ride from Baltimore to Annapolis on Sundays on my old Tomos Golden Bullet TT LX.
There is a very long stretch of flat, smooth pavement along the way, and with a little tinkering, I built a friction-lock cruise control from my ped - it would come off if you hit a bump, but otherwise..
Anyhow, one day I decided to be a smartass and bought the ole burger/fries/drink combo from McD's and wedged the cardboard drink tray in between the handlebars, resting on the speedometer.
Don't try this at home kiddies.
So here I was, rolling along at about 38Mph, enjoyin lunch on the run with the cruise control locked, and kickin steppenwolf out of the boombox bungeed to my cargo rack - it was kinda neat, and prolly quite interesting to watch.