The sound is familiar, but it puts Greg's hair on end. He's seen Sans in bad states before, sure, but never to this level. Something's gone way bad, and Sans' version of dealing with it has gone worse than ever. On top of that, there's a level of contempt in his voice that stings, even if it's lent by the alcohol. It's clear Sans didn't plan on being found like this. No one really does, while messing themselves up this badly.

"Christ, man... what happened?"

Greg steps in closer. Even if he's not wanted, he can't leave a friend in this state.