Well, the ground just pushes right back, supplying a force forward and up that propels the skaters into a glide or jump, depending on the particulars of the force they applied.

They glide on, the enormous multi-engined passenger jets, for thirty, forty-five minutes, only to smash themselves up when they attempt a landing.

The general low level of friction on ice allows a skater to glide along the surface smoothly without friction stopping the motion as soon as it's begun.