"If you see me comin', better step aside.
A lotta men didn't, a lotta men died.
in action at a Pennsylvania coal mine. (Carnegie-Mellon Univ)
"Could Robots Replace Humans in Mines?"
"Why do human beings still risk their lives burrowing miles under ground and doing one of the dirtiest and most dangerous jobs in the world?"
From NPR: http://www.npr.org/templates/story/story.php?storyId=12637032