Last Friday, I inadvertently found myself in the midst of the opening salvo of a battle to turn the Twin Cities upside down next year. I was driving home at rush hour from downtown Minneapolis, when several hundred bicyclists blocked the street leading to Interstate 394. My fellow motorists and I sat obligingly for several minutes, missing green light after green light. Finally, folks began angrily honking their horns. If two police cars hadn't moved the riders along, people might have leaped from their cars to take on the bicyclists themselves. Later, the protest ride turned ugly. Two officers tried...