Pulpo Mechanico at Burning Man 2019

The arms undulate up and down, the eyes bulge in and out, and the mouths open and close. What I did not imagine is that all of that motion derives from one central shaft.

The vehicle has a row of huge propane tanks down the middle, and it unloads so fast (from liquid to gas), that the tanks need a circulating warm water bath to keep them from freezing up.