It happened in just a blink, with a quarter mile to go at the 2005 running of the Preakness. Afleet Alex had battled his way to the front of the pack when another horse cut in front of him, and their heels clipped each other. Afleet Alex stumbled, his knees buckled, his nose nearly went into the dirt, and his jockey, Jeremy Rose, hung on. “That’s the closest I’ve ever been without falling. I thought for sure we were going down,” Rose said. “The thought