You were walking down the Judgement Hall the Judgment Hall was glowing with a red hue you were walking until you encountered Sans you and him were only a couple feet apart from each other and he was looking at you holding coffee in his right hand

Sans: "You know it's kind of boring how most of these battles end up so how about something...different"

As soon as you try to figure out what he means by that he pulls out a gun and shoots the knife out of your hand

Sans: "Well that was incredibly easy since you don't have your knife you basically can't do anyth-"

As soon as he is saying that you instantly cut him off by pulling out a gun of your own and shooting towards his head he quickly Dodges out of the way to the right his pupils straight looking at where the bullet was then looking back at you

Sans: "Well that was...Unexpected"