In my case, the first time was roughly 1993. I had this old hard drive that kept making knocking sounds and was unreadable, and my first thought was, "Let's just go ahead and see exactly why that MOLEX connector should only go in one direction."
I shaved the corners to match the bevel of the other side, and fired that thing up. While I was happy with the result, I can't help but think it would have been a little more exciting if the drive was functional. Some pops and smoke is great, but I was hoping for annihilation.