[It was a small moment. Nothing that would turn too many heads, and yet Sans found himself relaxing anyway. His laugh comes from a less taut place behind his ribs, glancing down the street towards a few other specters.]

I think most of my japes require a little more cognitive flexibility, pal. [It doesn't get more cerebral than passing gas, y'know.] But I could take a crack at it.

[As if on cue, Sans rolls his shoulders with a satisfying crack.]

Care to make it interesting?