[There isn't even a break in Sans' tune - he's just in front of J one moment and behind him the next. J turns, trying not to show just how much that startled him, and gives a low, admiring whistle.]

Yeah, that'll definitely come in handy.

So here's the question: if you aren't gonna remember this conversation - which, you might not - what do I tell you in real life to get you to trust me? [If they can get there without hitting the murder music stage of things, so much the better.]