<p>Powder-splattered, and powder-splattering, runners cross the finish line of the <a href="http://thecolorrun.com/about/">Color Run</a> 5K in Irvine, California, on April 22. Each kilometer (0.6 mile) of the event features a color-pelting station dedicated to a single hue, culminating in the <a href="http://www.jacksonpollock.com/art.shtml">Pollock-esque </a>riot at Kilometer 5.</p> <p>The "magical color dust" is completely safe, organizers say, thought they admit it's "surprisingly high in calories and leaves a chalky aftertaste."<br><br><strong>Why We Love It </strong></p> <p>"Vibrant color floating through the air automatically brings to mind festive Holi celebrations in India. We expect to see revelers in Mumbai, but instead find a surprise in the lower third of the frame—runners in California!"<em>—Sarah Polger, senior photo editor</em></p> <p>"There are a lot of eye-catching <a href="http://photography.nationalgeographic.com/photography/photo-of-the-day/holi-celebrants-india/">photographs of the festival of Holi</a> in India that show colored powder in midair, but this particular situation has the people all lined up in a row—making it easy to see each of their very cinematic facial expressions."<em>—Chris Combs, news photo editor</em></p>