It leads to comedy-like scenes of the two of us bickering as my stress levels build.
Him: "After we pass the BMW, change lanes."
Me: "When? What?"
Him: "After the BMW... change.. lanes."
Me: "But which one is the BMW! WHY CAN"T YOU JUST SAY AFTER THE BLUE CAR!!!"
Him: "You're slowing down... when you change lanes you're supposed to go faster."
Me: "STOP CONFUSING ME!!!"
My most dangerous mistake is when he says to turn left and I merrily do... only I turn left as if I were in the UK and therefore I turn immediately left into oncoming traffic. Bad.