Somebody finally made a video of one of these testing!
Here is the pic I took few years back:
http://i9.photobucket.com/albums/a82/da ... land03.jpg
Here is the video by somebody else, lol:
http://www.youtube.com/watch?v=52jRbM6uuoE
Picture and video, Chiswell, Portland, Dorset. United Kindom.