Sunderworld has less than half of Earth's gravitational pull. That means we not only way less than half of our Earthly weight on that planet, but we, and all objects, fall to the ground at less than half the acceleration that we're accustomed to here at home. Imagine pressing a barbell overhead weighing150-pounds on Earth. On Sunderworld, this same barbell weighs only 75 pounds. All native creatures, on the other hand, have developed their strength and speed in direct proportion to that planet's lower gravitational pull; to them, this same barbell feels like 150 pounds does to us.
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