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Police try to stop a student as he runs through the police barrier on the Norlin Quad at the University of Colorado in Boulder, Colo., on Friday, April 20, 2012, at 4:20pm. He was run down by police and arrested after crossing the barrier. Police blocked off the quad to prevent a 420 marijuana smoke out. (AP Photo/Ed Andrieski)

Potfest at Colo. university is much smaller

Stinky fish fertilizer and two dozen law-enforcement officers kept pot smokers away from a grassy quad at the University of Colorado on April 20, but a few hundred protesters defied the crackdown and rallied on another field, where some lit up at 4:20 p.m. It was a far cry from last year's April 20 pot celebration, when more than 10,000 people gathered