Having been unfortunate enough to have third degree burns on my legs (gas + stupidity = tenor running like the human torch), running them under water (I ran mine under our garden hose that was luckily there) does make the skin slough off... mine rolled down my leg like a tube sock with old elastic.
Every power tool booklet has at least one page of safety instructions. If a person is unfamiliar with the tool, they should be "encouraged" to read it. Common sense for safety around tools with rotating parts is no long sleeves, gloves or loose clothing. Looking cool, or emulating what one might observe being done at Orange County Choppers isn't necessarily safe. The director failed to enforce that very basic rule.
Van: I take personal offense at your little joke, "This is your hand going through a saw..." A very un-professional comment.