If I were invisible for a day, it might be fun to drive around my car in broad daylight and see how people reacted to a "real" self-driving car. Optimally, this would occur during the summer months, when I would just need to put on a swimsuit and a pair of flip-flops -- people driving next to me wouldn't be able to see anything when they pulled up next to me... (It might be harder to do in the middle of winter...)