In a great battle, Rama's brother Lakshmana was gravely hurt, and only one special healing herb that glowed on a distant mountain could save him. Hanuman flew off at once to fetch it.
But when he reached the faraway mountain, the precious herb hid among thousands of plants, and he could not tell which one it was. Time was running out.
So Hanuman simply wrapped his great arms around the entire mountain, lifted it, and flew it all the way back, so the healers could find the herb themselves. Lakshmana was saved.