My wife's standard response is "JESUS CHRIST GREGG, KNOCK IT OFF!", usually followed by comments about how I still act like a teenager. I take these as a compliment. Another recent response from a coworker was "OH MY GOD!". Apparently riding in an RS6 is a religious experience.

My 12 year-old daughter however, loves it. She is always encouraging me to do the "zoom zoom". I often have to explain that "zoom zoom" will get dad in "jail jail" in many places.