 doesn't know exactly what they're dealing with, they make an approach on someone, and it turns out it's a violent individual that's just committed a violent felony, you have them say, well, you know, if you had approached the car differently, if you had waited for a backup, you wouldn't have had to shoot this person because you wouldn't have given them the opportunity to assault you. It's a concept called officer preclusion or officer-created jeopardy.