Itīs from "From The Earth To The Moon", so itīs not "official" ..... but funny, never the less !
http://www.amazon.com/exec/obidos/tg...=quotes-trivia
"discussing what Neil Armstrong will say when he steps onto the surface of the moon
Frank Borman: What are you guys gonna say?
Michael Collins: If you had any balls, you'd say "Oh, my God, what is that thing?" then scream and cut your mike."