"None. Usually," he says, and nothing about how he's saying it makes it particularly sound like a joke, but as always, it's pretty hard to tell with how Sans says and does things. "Grew up trapped underground. Humans were the ones that put us there. Guess they had the same ideas about us that humans in other worlds do, except this time we didn't actually do much to deserve it."

Tap tap tap. He continues working at the computer, absently rambling about the topic.

"Occasionally a human would drop down there and get killed. It was a whole... thing."