Gaster was an elegant man. His back was always ramrod straight, his white lab coat spotless and pristine. If he hadn't pursued science, Sans thought to himself, he had the discipline and talent for music. He certainly had those hands – long, elegant pianist's hands...

...The shorter skeleton snapped out of his reverie as he walked in on what was possibly the most un-Gasterlike scene he could have imagined. The butterscotch-cinnamon pie Queen Toriel had so painstakingly prepared for them was in far more pieces than a pie should be and laid out in a neat long line on the table. Alligator clips were stubbornly planted into the slices, snaking back to...was that a printed circuit board? Was that a printed circuit board connected very unsafely to Gaster's sleek, dark laptop?

And was that a Temmie draping itself across Gaster's shoulders?

"Ah, Sans!" the Royal Scientist called happily. "Come see what I've made!"

"...a mess and a waste of pie?" A growling noise came from Sans's abdomen. Considering he didn't have a stomach or any other internal organs, that was strange, but he was far too hungry and confused to notice that.

"No, no, no!" Gaster gestured expressively with one hand and nearly knocked the poor Temmie off him. "My computer recognises that circuit board as a keyboard and I wrote some code that trivially takes keyboard input. It's a very simple piano program-"

"-so that's why you chopped up the queen's pie?"

"Into 88 pieces, yes, so I can play it properly!"

"do we not have 88 things of anything else in this lab you can clip to that board? because i didn't have breakfast this morning and i was really, really looking forward to that butterscotch-cinnamon pie..." Sans sighed loudly, trying to catch the other skeleton's attention, but he was too busy experimenting with his creation. Maybe experimenting was too kind of a word, come to think of that, since the dignified, elegant Royal Scientist was standing there licking his fingers and playing a silly tune to amuse the Temmie. It didn't do much to console a very hungry scientist, but at least Gaster and the Temmie seemed to be happy. That was something.

"What's that? You like that tune?" Gaster cooed to the Temmie. "Okay, well I'll record it for you. Drop by the lab later in the day, okay?" He set the little monster down with infinite gentleness and it scampered away.

Sans closed the lab's door with a soft click. "now that the temmie's gone, can we eat? no way you're using all 88 keys."

Gaster looked almost pained. "Very well, if you must eat this." He carefully unclipped one of the slices of pie at the very end of the table and handed it to Sans.

"bro, is this it?" Sans practically inhaled the slice. His non-existent stomach was not appeased.

"Can't you understand how proud I am?"

"yeah, sure, bro, but can't you understand that i haven't actually eaten and you used the food toriel made for us specially because you keep forgetting that you need to eat to make a frickin' musical...thing?"

Gaster's face fell. "Fine, but I have a name for it!"

"oh, really? at least the mashed-up bits of musical instrument i'm eating have a name. good to know, i guess."

"Yeah, it's a pie-ano!" Gaster beamed proudly. Sans facepalmed.

"bro, your punning needs a ton of work. a skele-ton."