Voltage never killed anyone, it's the amperage!
I shorted out a 480 3 phase panel one time when I was trying to pull off 220 single with alegator clips for a welder (thought it was 220 3 phase) and it blew a fireball out that knocked me back 10 feet, burned all the hair off my head and the skin off my face and I was totally blind for about 20 minutes, that was a real shocker. It also knocked out all the power in the Lawry Foods Plant that we were working on.
You know, multimeters were invented for a reason. Just because it it has a certain kind of plug or colored wire doesn't mean the person before you wired it that way. Did you feel embarrassed afterwards? I would have. Glad you learned about metal plasma.