You can get stung pretty bad with home electricity, but when I am operating an excavator YOU ALWAYS have to be aware. I will be dredging for a week and have to work under high voltage lines......you cannot even think about getting close.....if you do it is over.....there is no second chance. If you day dream, think about something else, or get into a repetitive routine which lulls you into complacency......you are in danger.