I'm Michal "The Joggler" Kapral of Port Hope, Ontario, Canada, and I run marathons and other events while "joggling," an actual sport that combines jogging (or running) and juggling. I hold the Guinness World Record of 2:50:12 for the fastest marathon while juggling three objects. (I also chewed gum every step of the way.)
Here is some slow-motion joggling from my half-marathon record, set to opera music. After I finished laughing at this, I noticed just how perfectly each toss must be timed to match the running stride.