What an odd business secret-servicing can be: One minute you’re sitting in a car outside President Barack Obama’s Chicago house, just standing guard, and the next some guy is (allegedly) spitting on you. And not a little fleck of spit, either. According to police documents charging 46-year-old Kevin Lawrence with aggravated assault on a peace officer for the Dec. 29 incident, Lawrence approached the agent’s car and “spit inside the car, hitting the agent’s face and neck.” Of all the occupational hazards, that’s not one we would have predicted.