(There's a video on YouTube I can't seem to find on my tablet but have watched on my phone countless times. Made by Anthony Kuroma, titled "DO NOT MESS WITH SANS GIRL - Undertale Sans X Frisk, Sans and Frisk NOT SANS XTORIEL".)
(First part)
Fran: Frisk is such a crybaby. He just called you a faggot and you suddenly come running to Sans. What a big baby.
Sans: WTF DID YOU JUST SAY ABOUT MY GIRL *Megalovania intensifies*
Fran: I've murdered way worse than you, ya little squirt.
(Second part)
Fran: OMG MY DREAMS HAVE COME TRUEEE
Fran: THEY HAVE CHILDREN!!! THREEE OF THEM OMG OMG OMGGGG *fangirl meter goes through the roof* *blue-screen-of-death's*
Sans: *waves hand in front of her face* Uhhh...you okay?
Fran: Error. Please show Sancest picture.
Sans: WTF...
(Last part)
Fran: *screams with them*
*every bit of glass in the city breaks, every person who hears is deafened and killed*
Sans: *covers "ears"* DO YA HAVE TO MAKE THAT BIG A DEAL OVER A SHIP