Baxian Yu Tiaozao

When the Eight Immortals crossed the East Sea, each displaying their unique abilities, the Dragon King of the East Sea nearly tried to stop them. After a fierce battle, the Dragon King yielded and transformed into a dragon boat for the Eight Immortals to leisurely board, allowing them to cross the East Sea smoothly. Upon reaching the shore, the Eight Immortals rested at an inn when a flea suddenly appeared, visiting one immortal after another, harassing them. The Eight Immortals tried together to catch it, but no matter how hard they tried, the flea remained unharmed. Just as the Eight Immortals were feeling dejected, they saw the innkeeper's waiter easily catch the flea with his hand, rendering it powerless. They were astonished.

(Source: Douban, translated)