I am amazed at these new spy drones.
This one really reminds me of the big white security ball (Rover) in "The Prisoner"
Click on this link to read more & see a really cool video of the drone in action:
http://www.geekologie.com/2011/06/peeping-tom-spherical-drone-spyball.php
This next one is video of a hummingbird shaped drone & it is amazing. I know I wouldn't think twice about a small hummingbird in my backyard unless it followed me into my house.
http://www.crunchgear.com/2011/06/01/darpa-video-shows-the-evolution-of-the-hummingbot-nano-uav/
Be seeing you!