Trash Man Productions | Undertale - Sans's Death Counter @TrashMan. | Uploaded October 2015 | Updated October 2024, 3 hours ago.
Full battle here: youtube.com/watch?v=9bo3w3Ju_fI

Whenever you get killed by Sans and come back to fight him later, he makes a comment about your total deaths up until a certain point
There are two pieces of dialogue that I missed, which you get when you defeat him, reset the game and then fight him again:
"..."
"that expression that you're wearing..."
"..."

"well, i won't grace it with a description."

Doing this twice:
"..."
"that expression that you're wearing"
"..."
"you're really kind of a freak, huh?"

#Sans #Undertale