When the flame went up from the altar to the sky, the angel of the LORD ascended in the flame. When Manoah and his wife saw this, they fell facedown to the ground.
KJV
For it came to pass, when the flame went up toward heaven from off the altar, that the angel of the LORD ascended in the flame of the altar. And Manoah and his wife looked on [it], and fell on their faces to the ground.
ASV
For it came to pass, when the flame went up toward heaven from off the altar, that the angel of Jehovah ascended in the flame of the altar: and Manoah and his wife looked on; and they fell on their faces to the ground.