Was anyone else reminded of Mario Party's fingerpointing subgame? Man I sucked at that game; I guess it means I'd suck at this too. I hope it's easy to correct mistakes on this thing.

I'm pretty sure the egg shape is ellipsoid and if so is taking advantage of this property for noise cancellation. With speaker cones at the focal points, any vibrations hitting the walls from one speaker cone will invert their signal upon reflection and hit the other focal point(other cone), effectively using limited noise cancellation on any signal that hits both speakers.

I've had this happen to me before. I had an analog wristwatch for the longest time, and one day when I woke up it was running backwards. It was still settable though, and made for some interesting looks when I translated the time for people. The thing is, sometimes an analog watch will have a gear slip out of place, and if it's a normal gear and not one of the scaling gears, the loss of that gear will cause the watch hands to reverse direction.

I wish the watch still worked, but it doesn't; broke down little over a year after it reversed direction. Wore digital watches ever since.