1: Leaving girlfriends house in winter, hit the open button to stick my arm out and wave. Look up as the cover slides back revealing a nice pile of **pfffffftpfpfpfpfttttt**... snow.
2: Driving past kids playing the rope game, or whatever you call it when they stand on either side of the road and pretend they are holding a rope. Humor then a little and stop in front of the imaginary rope, then stand up through the sunroof and blast them with a super soaker.
I had quite the horror when I choose to put one in my Buick LaCrosse. We put the template on the roof, marked it out, sawed it out with a long fine toothed blade. Didn't realize Buick run an 18 wire harness right down the middle of the roof. It was some fun splicing time. All went well, and the episode was shared to the Dealer when I traded it in.