Me, I'd fall to my knees and pray to be allowed to touch even the strap of His sandal that I might be healed and made pure in His sight. I have thought about this before. I have a bad hip and walk with a cane so I would probably bow and greet him with the words, "My Lord and My God."
I think I would fall prostrate in shock or probably would be so overwhelmed and illumined by the loving warmth and divine light that I would be unable to speak.