When ever I have someone in the 3rd row I announce to the second row people I can make the third row people yelp. They quizzically ask how and I bring up the Controls window and press the headrest release button which slaps the third row people in the back of their head and always makes them yelp. It's not enough force to hurt anybody, just a little bump but with the noise too it scares them pretty good. Oddly I have trouble getting my kids to sit back there now.