Pics or it didn't happen.
PCI-e power connectors are keyed so they only fit one way. If it was possible, we'd have read dozens of stories just like this over the past year.
Unless you have gorilla-strength and are able to force square pegs into round holes, then it's impossible.
I know, I know. It sounds increbible...

i did it twice last year, and was stunned it was possible AND that it didnt explode/destroy my hardware.
but i do have gorilla powers.
i think its down to how much 'give' is in a particular connector, but it definitely is possible.
i imagine more people have managed it but kept it to themselves for fear of ridicule.
and i am yet to see a PSU connector with 'round' holes
fuck the haters, i say - let them cry themselves to sleep don't cry