"Champagne stops" are the norm for me when friends or family are in the car. I try to be as smooth as possible while maintaining illegal speeds unbeknownst to my passengers; it’s kind of a game I suppose.
What’s weird is that I drive slow when alone on open freeway and always the speed limit, but when traffic backs up and my forward progress gets impeded, I drive more aggressive and faster in an attempt (futile most of the time) to get around the annoying slower traffic! I often remain more aggressive for the balance of the tourney because of this. I have to work on that.