You've just left the RUINS after convincing Toriel to let you go. Now you're out in the cold, bitter cold of a snowy forest. Pushing through the cold, you travel forth, walking down the path.

You can see your own breath in front of your face with each exhale you release...

A few minutes of walking passes, and you could swear you're being followed. You keep hearing footsteps behind you, but every time you turn around, there's nobody there... You must be losing your mind.

You come across a short bridge that goes over a deep gap in the ground. Then you hear those footsteps behind you again... This time, they're followed by a voice.

"H U M A N . . . D O N 'T Y O U K N O W H O W T O G R E E T A N E W F R I E N D ?"

"T U R N A R O U N D , A N D S H A K E M Y H A N D ."

You slowly turn around and face a paunchy figure, extending a skeletal hand towards you.

You reach out hesitantly, and take his hand. As your hand grips his, you hear a loud "PFFFBFBBTBBFBTTTTT!!!!!"

"heheh. the old whoopee cushion in the hand trick. it's always funny." The skeleton gives you a big, dumb grin.

"heya. i'm sans. sans the skeleton."