[Papyrus steps back from the waterway once the human's safely on the walkway, and starts leading the way back toward the employee-only access tunnel he came from. No walking to the end of the ride without riding it properly, that's cheating!

In all honesty, it was Sans who made the phone call. He handed it off to Papyrus after a bit. But for Papyrus, the part where he was talking is the important part. Absolute precision with his magic has never made him as precise about giving credit for his accomplishments...]

Hmmm... The beginning is pretty far back. How about I start with when I first met you. And we can add in more before that, as we need to.

[Telling about his whole life would be enjoyable, but maybe too much. He coughs a throat-clearing sound, and barrels on without waiting for an answer.]

So you remember that I was a sentry, of course! Tasked by Undyne to capture you, which I very seriously wanted to do, because I could see she was hesitating to let me into the Royal Guard...

But you were just such a good sport about it all. Even if you escaped when I did capture you. And so you convinced me to be friends instead, and we hung out before you went on your way...

[Leaving a small swathe of disappeared, important figures in the Underground. Papyrus pauses, contemplating how best to tell that part.]