I'm a big fan of the Tour de France.
If you're not familiar, a stage of the most storied bicycle race on the planet works something like this: teams of riders have a common start time, and then inevitably several teams (or individual riders) break off from the main group. Sometimes it's just to test the rest of the field for a bit, sometimes it's to make a genuine run at winning a stage, and sometimes it's to screw over another team. But to make a surprisingly complex sport far too simple, the fun of watching the Tour is figuring out the cat-and-mouse game that plays out as the main group of riders tries to figure out how to hunt down those that broke away from the pack.