Besides, the guy asked for it. You just can't use offensive profanity towards an officer. It is considered preemptive to assault. If you want others to pay attention and be your witness, then yell just that out. The officer will understand that. In fact, you can request another officer arrive to verify the officer is legit.

In fact, nearly ALL "surprise" attacks occur moments after offensive language.

So here is a tip, do not try to command an officer to leave his duty. That can be seen as mental instability.

Do not ever contradict yourself beyond simple language mistakes.