is back at it again, and this time, they’ve built a Mentos (648 tins) and Coke Zero-powered (108 two-liter bottles) car. Here’s how it works: the car “uses a piston mechanism: a six-foot long rod sits inside a six-foot long tube attached to each bottle of Coke Zero. When the Mentos drop into the soda, the pressure tries to push the rod out of the tube. With 108 rods all pushing at once, that gives us a lot of power.” Video after the break.