At Tier 3, the focus "Stands like a bastion" grant the ability "Unmovable" (p. 171):
You avoid being knocked down, pushed back, or moved against your will as long as you are upright and able to take actions. Enabler.
What if a character with such skill stands against a gigantic rolling boulder? Does she stops the boulder? What if she try to stop an hydraulic press with his body?