Here's a blast from the past:
The guys from Eepybird were among the first internet video pioneers, who hit upon using the propulsive force of putting the rough textured Mentos candies into carbonated beverages to make kinetic and performance art.
They have since secured sponsorships (from Coke and Mentos, of course), and gone on to making additional kinds of art, but there's something truly mesmerizing about that explosive fizz of adding Mentos to the bottle.
Their latest? Human propulsion. I think gas is still cheaper for the mileage.