Everything in the world is not a rock waiting to be lifted. Some rocks fight back. If you’re competing with someone, and your goal is as much to keep your opponent from succeeding as it is to succeed yourself, that’s an Opposed Action. Obvious examples are arm wrestling and tug of war—in those cases, only one person can win.
Here’s an example of arm wrestling. Arm wrestling is likely to be based on Lift, so two people arm wrestling each make a Lift Roll, as if lifting no weight. If one fails, then that person loses. If both fail, they use maximum EP (5) and try again. If both succeed, they can use the Q to reduce the EP used, as normal, and Q can also be used to reduce the opponent’s Q, at a 2 to 1 ratio. It takes 2 points to reduce the opponent’s Q by 1 point. If a person’s Q is reduced to less than 0, that person loses.