You don't know how much I wish I had one of these when I was a kid! Even though at first glance it may seem useless, imagine the faces on so many poor bastards the next time you walk into a library, open your laptop, hit the switch and run!
I would have enjoyed a loud siren instead of cheap explosion sounds though. This would go great with a matching wallpaper, for that added pants-emptying effect. What would you do with it?