Board Thread:General Discussion/@comment-27524978-20160210030742/@comment-5956954-20160401035934

ItsBloonTasty wrote: The only reason Sans can count the times you die us because he kills you. If Sans was in Snowdin and Frisk died in the Ruins, he wouldn't really know. Sans knows how many times he killed you because he is a "read the audience" type of guy.

"hmm... that expression..."

He can pinpoint the slightest details on your face, your movements, aura, etc. because of that, making it look like he is an oracle or something. Pretty crazy. Unlike Flowey, he doesn't have the mind of a veteran, nor the extraordinary ability to remember or feel stuff like that, just tell the details.

That is my two-cents at least.