I've been in contact with hot 277 but on an open neutral. I had let go of an MC cable that was on and the 277 neutral landed on my cheek. I fell off a 6' ladder pulling down a lot of T-bar ceiling. Another time was across my thumb. Not much contact with hot 120, though.
A friend out west (Nevada) where I used to work told me of his friend who had been working for Nevada Power (NV Energy) at the coal burner just north of Vegas, and for reasons unknown removed the bus cover on the outgoing bus from one of the generators (13.8 KV) and fell into this enclosure, landing on his back. Of course it tripped the generator and almost tripped the station. He had told me this when a young guy was asking us if there was anything worse than getting killed by electricity. My friend told us that after about 8 months in the hospital, with numerous skin grafts, that his friend was sent home, hideously scarred and unable to have full motion. His 3 family members that had given him skin grafts had to discontinue because of no more available skin and too much pain in healing for them. He tested positive for drugs, lost 75% of his workman's comp claim, and was terminated from NV Energy.