Obviously it was the cops fault... what was he thinking even being in the area, caused hysteria amongst the well behaved riders, they were doing absolutely nothing wrong. Pretty sure in that jurisdiction sidewalk riding and running red lights, (as long as your in a group of squids), is not only legal but encouraged. The officer should have simply walked over, brushed the dirt off the riders T shirt, then assisted with getting bike back on it's kick stand, and blocked the live lane until the rider was ready to proceed.