G-d's Back

When Moses saw G-d's backside what exactly did he see?

When G-d came down in the cloud and stood there with Moses and passed in front of him what was this like experientially? Moses bowed down to the ground at once and worshipped... when I, in my minds eye try to imagine what G-d looks like I tend to think of the aurora borealis...

Moses saw something... he heard something...

^{Exodus 33:18} Then Moses said, "Now show me your glory." ¹⁹ And the LORD said, "I will cause all my goodness to pass in front of you, and I will proclaim my name, the LORD, in your presence. I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. ²⁰ But," he said, "you cannot see my face, for no one may see me and live." ²¹ Then the LORD said, "There is a place near me where you may stand on a rock. ²² When my glory passes by, I will put you in a cleft in the rock and cover you with my hand until I have passed by. ²³ Then I will remove my hand and you will see my back; but my face must not be seen."

^{Exodus 34:5} Then the LORD came down in the cloud and stood there with him and proclaimed his name, the LORD. ⁶ And he passed in front of Moses, proclaiming, "The LORD, the LORD, the compassionate and gracious God, slow to anger, abounding in love and faithfulness, ⁷ maintaining love to thousands, and forgiving wickedness, rebellion and sin. Yet he does not leave the guilty unpunished; he punishes the children and their children for the sin of the fathers to the third and fourth generation."

⁸ Moses bowed to the ground at once and worshiped. ⁹ "O Lord, if I have found favor in your eyes," he said, "then let the Lord go with us. Although this is a stiff-necked people, forgive our wickedness and our sin, and take us as your inheritance."