Ironically it was at Siemens where I was working for when one fellow got
electrocuted. It seems he grabbed on to a 480VAC 3 phase buss while pulling
himself up from underneath a linear accelerator. Instant death.
Good point about being tired. It's best to come back another day. I have
worked for many companies that had the "2 man rule". Of course nothing
could save you from 480V 3 phase.
A little fear, like fear of God is healthy - respect a requirement.