When Gotama had left his palace, He had promised Himself to return after gaining Enlightenment. When He went back to his father's capital, Kapilavatthu, as a Buddha, His relatives and the elders would not greet Him properly. He instantly rose into the air and floated motionless above them, thus impressing upon them the respect that was due Him as the Enlightened One.
Wat Rajsittaram, Bangkok, Thailand