I believe He saw as I read "A angel" OF GOD. I believe the Holy Spirit was there as well. The Angel was standing in the presence of God and the ground was Holy ground for whatever the Spirit touches becomes Holy. When Moses went up the mountain then He was allowed to see God's backside as God stated no man may see my face and live.The Angel of the LORD is God.
And the Angel of the LORD appeared to him in a flame of fire from the midst of a bush. Exodus 3:2
And Moses hid his face, for he was afraid to look upon God. Exodus 3:6
Do you believe Moses saw God?
This is the same language as Jacob when its described He wrestled with God and saw Gods face.
Yet we read in Hosea about Jacob's encounter with God, "He struggled with the angel and overcame him;"