Perry is correct- you juggle by feel and keep your eyes on the road. In fact, I have found that my juggling pattern runs so close to my body and just a bit below my eye level, so there really isn't a way to watch the balls at all. Most juggling is like this. Your brain knows where the balls will be after you throw them, not your eyes.
Thanks to all for well-wishes. I completed the run in record time (for me), 3 hours 8 minutes for the 20 miles, even with the addition of three miles of joggling. Over $1500 raised for refugees. Yay! If you'd like to learn more about LIRS and its ministry, visit their web site.