IIRC, SteelPush/Steelpulling obeys the newtonian law of action/reaction, but on a straight line only, so the character may carry a bag of coins and use them in a leapfrogging fashion to pole vault continuously, pushing the coin into the ground (the action) and riding the line of force (the opposite reaction) where the pushing force is now down against the ground, using the coin as the force’s point of contact since it’s metal.
There is advantage that it only works in a straight line; without this constraint it would be like trying to balance on top of a crystal ball. or more accurately, like trying to stab a chopstick through a crystal ball.
The coin has so little mass that it pushes away from the character without pushing back against the character very much, but with the coin against the ground, the ground has much more mass and therefore pushes the character back. then the character may steelpull the coin back up into her hand and therefore never run out of coins, and continue invisible pole-vaulting like this until the metal powder in her stomach burns out.