IDIOM - To "fall off the face of the earth"

IDIOM - To "fall off the face of the earth":

"To disappear/vanish off the face of the earth" (British, American & Australian), also "to fall off the face of the earth" (American).

It means to disappear completely.

Ex:
"We lost contact with Ed after he left college - he just fall off the face of the earth."

I dreamed of flying once! Only me or is it something normal? Please tell me too if you ever dreamed of flying