Then there were the two years he spent building and customising the 1970 Dodge Charger from The Dukes of Hazzard. Or the time he filmed an exquisite shot-by-shot re-enactment of You're The One That I Want with his wife Katarina in the Olivia Newton-John role, for no apparent reason other than that Sagan thought it would look pretty neat. This is, in short, a man who plays by his own rules, who navigates his career not just by training schedules or power outputs, but that strange and much-neglected currency: fun.
This, perhaps, is the most revolutionary idea of the lot. Consider Novak Djokovic: a man with all the talent in the world, but who admits to spending the last few months trying to regain the simple enjoyment of tennis. When we talk about what motivates athletes, most of the same themes tend to recur: trophies, medals, money, fame, legacy. How often do we mention fun?
Sagan mentions it a lot. "My hobby is my job, so I can ride, have fun and make some money," he said recently. There is a simple childlike lust there that you occasionally glimpse in other sporting geniuses: Lionel Messi, Bubba Watson, Sachin Tendulkar. Strip away the straggly beard and the sponsors' logos, and you still see the Sagan who first sat on a bike all those years ago.
Why dedicate yourself to a job unless you truly enjoy it? Why settle for anything less? Whether on the bike or off it, Sagan reminds us that sport should be fun. Going to work every day should be fun. Hell, life should be fun. And whether you are on a dreary commute, or sitting in an office wondering if anybody will really miss that blue stapler, perhaps we can all learn something from that.