DUI stops are big business in California. This is set up to ruin peoples lives after having a few drinks. They judge you by personal appearance then "point" to your car and order you to get into the other lane.

Me: (Rolls down window 3 inches) Good Evening Officer What’s the Reason for the Stop?
Cop: Roll down your window.
Me: Rolls down another 3 inches.
Cop: I said roll down your window all the way! Now!
Me: What is the reason for the stop sir?
Cop: Why are you asking me what the reason for the stop is – you don’t the read road signs?
Me: The sign says "Seach and Rescue". What’s the reason for the stop?
Cop: Let me see your drivers license (very stern and nasty)
Me: Sure officer, what’s the reason for the stop?
Cop: I do not have to tell you the reason for the stop. Let me see your drivers license now!!
Me: (scared) Gives Drivers License.
Cop: The reason for the stop is this is a DUI checkpoint. Have you had anything to drink?
Me: NO
Cop: Do you have any drugs in the car?
Me: No.
Cop: Get Lost
ME: (drives away)