Such was the appearance of the likeness of the glory of the Lord. And when I saw it, I fell on my face, and I heard the voice of one speaking. ~ Ezekiel 1:28b (ESV)
Ezekiel is known for the strange and wonderful visions he received from the Lord. He saw living creatures with wings and four faces (human, lion, ox and eagle). They glowed as if wreathed in flame and carried a strange vehicle with a crystal platform and a throne. The person sitting on the throne shone so brightly that he appeared to be made of red-hot, glowing metal.
When frail humanity is exposed to infinite majesty there can be only shock and awe in response. Ezekiel fell on his face, a perfect posture to hear the Word of the Lord.