And they are, indeed, as overconfident as advertised!

If you've got no idea what this is, you should take a look at the Kickstarter page for the Bike Balls Bicycle Light.

It's a flashing bike light.  In the form of a set of balls.  That bounce around as you ride.

They're surprisingly firm in the hand.  And quite bright!  I'm quite happy with the purchase.  More rear light is always good.