Here's a test to see how fast you can untie your shoes. You can use both hands, but you can't use your thumbs. Not so easy, is it? And, yet, do you realize that 25% of all disabling injuries involve hands and fingers?
Electric shock, and too often fatalities, occur on construction jobsites when temporary power systems are in use. All construction workers who operate power tools should receive training in the systems that safeguard them from electrical hazards.