I was delivering mail to a house a couple weeks ago with a steeply sloping driveway covered in 1/2 inch thick ice that had been rained on and was now smooooth. As I walked up the driveway a fella stepped off the porch and slid 60 feet to the bottom of the driveway without moving a muscle. I stomped past him with my 20 pound satchel on, delivered the mail, stomped straight down the driveway at normal speed, then planted a foot at the bottom and made a right angle turn to carry on my way. The cab driver that was picking the fella up said his jaw dropped and he said, "What the f***? How did he do that"!