Is that how it happens?
Playing my electric guitar thru an old amp in our rehearsal studio. It's one of those old two-prong, tube amps. I guess, not grounded. I'm playing electric guitar, and I reach my hand out and adjust my microphone. And a little blast of electricity courses thru me. Not a big blast, just a little rippling stream of electricity. I don't freak out, don't feel pain, don't really react in any overt way, except, there is this little thought bubble in my head: "Wow, that's electricity!"
I finish the session, make sure not to touch the microphone. Turn off the amp. Put my electric guitar in it's case. I tell my friend about the little event. They remark: "That's why they call those old-time amps, 'Widow-Makers.'"
And I think: Is that how it happens?