Maybe you're not a fan of either Diet Coke or Mentos candies, but they sure can put on a show together.
A show Stephen Voltz and Fritz Grobe have been putting on for years now as the mad scientists of Eepybird.
Actually, neither is a scientist; Stephen is a lawyer and Fritz is a juggler.
But they put on great demonstrations of everyday objects doing extraordinary things.
And they share many of their secrets in a new book, How to Build a Hovercraft.