Imagine you're circling a crowded parking lot. Just as you spot a space, another driver races ahead and takes it. In a world of road rage, domestic violence, and professionally angry TV and radio commentators, your likely response is anger, even fury. Now imagine that instead of another driver, a cow has lumbered into that parking space and settled down. Your anger dissolves into bemusement. What has changed? Not just the occupant of the space but your perspective on the situation.