One day in 2009 Robert Milner (not his real name), a lawyer and avid outdoorsman, was driving on a highway through the mountains of Washington State when he sensed he was tumbling sideways. Had his car flipped, propelled perhaps by an unseen T-bone collision? Milner slammed on the brakes. The car stopped—but not upside down. It sat fully upright in the middle of the highway. There Milner stayed, stuck in his mental tailspin, until the highway patrol arrived.