|Scientist calls the lab (in Andrei Tarkovsky's "Stalker")|
What do you do when you find an operating phone in the midst of a long-abandoned dungeon? You're on the threshold of the final room on the final level. This is the kind of dungeon that has a destination.
Do you pick the phone up when it rings? Do you phone the people back in the lab? The ones who didn't believe in you? The ones who thought you'd never make it, that you didn't know what you were talking about in the first place?
The ones who ratted you out to the authorities.
When the phone's just there ringing at the threshold, it's strange to pick it up and answer. It's probably just as weird to phone home and brag that you were right after all.
But maybe understandable.