Apollo 17 conversation: They find something startling, and are ordered to immediately switch to code

DMP (lunar module pilot): What are you learning?
 
Capcom: Hot spots on the Moon, Jack?

DMP: Where are your big anomalies? Can you summarize them quickly?

Capcom: Jack, we'll get that for you on the next pass.
CMP (command module pilot): Hey, I can see a bright spot down there on the landing site where they might have blown off some of that halo stuff.

Capcom: Roger. Interesting. Very - go to KILO. KILO.

CMP: Hey, it's gray now and the number one extends.

Capcom: Roger. We got it. And we copy that it's all on the way down there. Go to KILO. KILO on that.

CMP: Mode is going to HM. Recorder is off. Lose a little communication there, huh? Okay, there's bravo. Bravo, select OMNI. Hey, you know you'll never believe it. I'm right over the edge of Orientale. I just looked down and saw the light flash again.

Capcom: Roger. Understand.

CMP: Right at the end of the rille.

Capcom: Any chances of - ?

CMP: That's on the east of Orientale.

Capcom: You don't suppose it could be Vostok? (a Russian probe).

Wilson writes (p. 141): "The Vostok flights took place in the early sixties and were *strictly Earth orbiters*. They never reached the Moon!"