1)
What was standing in front of him?
1.
Malbim: There was an image, but he did not recognize it. He saw it faintly.
2)
What is the meaning of "Demamah v'Kol Eshma"?
1.
Rashi #1: I heard a quiet voice.
2.
Rashi #2: I heard a voice from Demamah (the angels' Shirah - "Kol Demamah Dakah"), but I did not hear the Demamah. Moshe heard the Demamah. Earlier [generations] used (heard) a Kol; later [generations] used a Bas Kol. This is like one who bangs with a hammer - an echo is heard far away.
3.
Malbim: I heard something faint, between Demamah and Kol, as if it was both together.
