The double push has been around for years as a way to skate in the rain.
In Holland, skaters shorten up their normal push length but make up for it adding a push to the inside first. (The push to the inside is like a crossover push, but instead of lifting your leg over in front, it recovers behind like in a normal push.)
Notice how the red dots correspond with the wheels on Chad's skates (on left side, Chad is skating towards you, while on the right, in the two-dimensional view, he's going away from you, so left and right are switched). Rarely are both skates on the ground at the same time.
Where's the glide? There is none. He's actively pushing with one skate the whole time! There's no pulling involved. To push, whether a regular push or a double push, get "a-woo-ga" out of it by going from a bent position to an extended one!
Here's the double push drill of the milleneum: If you can skate like a snake on one leg, then you can rule the double push (take a single green segment from above and repeat it ad infinitum on one skate)!!!
