The happiest 5k on earth

I have registered for this fun run and I can't wait! Of course "run" in my case is a euphemism for "stroll unless you are passing someone you know, in which case jog until out of their line of vision," which is pretty much how I managed the cross country for every year of high school. But still I can't wait. I want to drown in the colour! Anyone know how to cornflour-proof a camera?

Have you ever done a Color Run in your city? Any tips I should take with me?

All images from The Color Run website.