Look at Link's arms. Now back to the gigantic shard of volcanic rock. Now back to Link's arms. Now back to the rock. The rock is now in his hands. Look up. The rock is now sailing through the air. Back to Link. He hasn't broke a sweat. The rock is now tiny bits of rubble. He's on a horse.

The Golden gauntlets allow Link to lift extremely heavy things and toss them around like they're nothing. He can't move while holding these things if they're really massive, but he can still toss them about.