Sans was completely frozen from his soul's spirited embrace. As for the soul himself, he had already dropped the poor skeleton onto the ground (gently, mind you) and was now taking his time examining the others around him, very reminiscent of Frisk did when they first fell into the underground.

Sans would spend a few more seconds in silence before he was able to choke out the question that was on everyone else's mind.

"Who...who are you?"

The other skeleton whipped around to face Sans. Then the question registered in his mind and he had the wore the expression of how-could-you-betray-me-like-this. The most ridiculous part about the stout skeleton's reaction was the fact that it was completely genuine. Not that it seemed genuine. It full heartedly was so.

It was particularly strange to everyone when the Sans lookalike broke into tears.

"H-how could you forget me? WAS IT REALLY THAT LONG?!"

The next question shocked everyone, and made them question the new comer's, and their own, sanity.

"HOW COULD YOU FORGET ABOUT YOUR OWN SOUL?!"

*Ping*

Papyrus applied his blue magic onto the crying fellow, and everyone watched in even more confusion as, instead of the familiar blue heart appearing in front of the victim, the entire skeleton, clothes and all, turned into the dark shade of blue.

As for Sans, he recalled when he felt the first flicker of an emotion and his eyelights disappeared.

It was right before Frisk brought the guy into the clearing.

Undyne threw back her head and yelled. "NGAHHHHHHH! Where's Alphys when you need her?!"

Impossible drops of sweat formed on Papyrus's skull."AGREED."

And Gaster, well, he was starting to question his decision to not go with the soul.

But let's focus back on the initial situation.

Sans's soul landed on his nonexistent butt and was currently;

#1. Rubbing his rear end tenderly

#2. Looking a lot like a kicked puppy

At this point, Toriel decided that she wanted learn a little more about Sans's soul. So she attempted to strike up a friendly conversation with him. The only mistake she made was expecting him to talk as if he were a six year old.

"So, my child. How did you get here?"

Keep in mind that this soul also spent eighteen with the original Royal Scientist. The void doesn't have much entertainment, mind you. Gaster also wanted to tell someone about some theories he made, but never got the chance to tell his co workers. Mind you, the void only had one other person in there, and it was the soul of the assistant of the Royal Scientist.

Poor goat mom.

She thought she was going to get a understandable, slightly childish respond.

"Oh! Through one of the many distortions of the void! They're caused due to-" and the rest of his response ceased to even remotely sound like english and left everyone, save for Sans himself, who found the theories quite interesting (another new feeling) and intended to have his soul share them to him in more detail later, speechless.

The soul finished his ridiculously incomprehensible explanation in a few drawn out minutes and oblivious crickets chirped almost as if on cue. The soul started to sweat nervously at everyone's seemingly unnatural silence. He smiled awkwardly. So, as most sentient beings when they feel uncomfortable, they try to find something familiar to calm themselves.

The soul addressed his other half. "So, uh, what do you think Sansy?"

"I think we might as well enjoy the picnic."

And one by one, Sans's suggestion sunk into everyone's mind. His soul was the first one to speak. He also happened to be the first one to complain.

"But Sansyyyy~The atmosphere's so tense!"

"Please stop hugging me."

"Seeeeeeeeee?"

Toriel sighed. "We did go all this way for a picnic. It'd be a shame to let it all go to waste."

And so it was agreed. As awkward it was when it turned out there wasn't enough food for the soul ("Don't worry, I don't get hungry."), the stargazing went rather well.

(Mostly everyone forgot about the soul and the soul ignored everyone and ended up going to sleep in the car used to bring almost everyone there but that's not important.)

Everyone remembered the soul again when Undyne accidentally sat on him while getting in the car.

"Hnnggh!"

"Ow, what?"

A spinal cord isn't the nicest thing to sit on, and being sat on is just unpleasant in itself. These simultaneous events caused Undyne to jerk up and hit her head on the roof of the car, and caused the soul to roll off of the car seat and curl into himself.

Both of them ended up in a fetal position.

Papyrus then took the responsibility to help Undyne to a non-spinal-cordy part of the car seat.

And here the group met a dilemma.

Asgore's and Toriel's bigger frames meant that no extra passengers could fit in the front. With Undyne, Papyrus, Frisk, and Flowey in the back, it was already extremely cramped. There was no way both Sans and his soul could fit in there.

So the soul came up with a suggestion.

"How about we tape Sans to the roof of the car?" There was a collective blink throughout the group before the soul continued. "He won't feel anything because I'm not with him so he wouldn't be scared. I remember seeing some duct tape in Undyne's bag while you guys were stargazing. Also, Papyrus could apply his blue magic on Sans's entire body, just for an extra precaution."

It only took a few minutes the strap Sans securely onto the top of the car (all of the duct tape Undyne had with her was used, but she didn't really mind) and everyone got in.

It was rather peaceful while they drove out of the clearing, and they didn't meet anyone on there way out. Undyne was bored, so she decided to start playing anime openings on her phone. It was really loud, so everyone unanimously decided to roll down the window to save their existent and nonexistent ear drums.

Then they entered the freeway.

Any passing cars would remember the strangest sight of a skeleton taped to the top of a unusually large lamborghini.

His expression was one of absolute terror, with stray red tears escaping his eye sockets every now and then.

The unexpected harmony of the duet of an english cover of Noragami's opening theme and the terrified baritone screams of the skeleton would last many weeks in any passing drivers' mind, and even longer on y0utube and twitt3r.

And Sans received two new things.

#1. The feeling of fear.

#2. A phobia of car rides and rollercoasters.