Susy,
What did the cops tell you their reason was was for holding a gun to your head? I don't think cops just pull people over and get them out of a car with guns out unless there is a good reason.
The statement was made earlier, everyone hates the cops when they get pulled over but, when they need the cops, they don't hesitate to call. If people hate the cops, why call them. You have to talk to them then.