[ Any other time, he might pop off some kind of necrophilia joke. Sans gets lucky this time. ]

That's third date material, pal.

[ He leans his weight against the observation glass, going for subtle, hopefully. But his hands are steady when he goes back to peeling the orange, impassively watching Sans' approach, so he'll go ahead and count his blessings. ]

Better question: explain how you just did that, because the potential applications of instant teleportation are many and varied, as I'm sure you can imagine.