Just had my memory jiggled and I remembered two more fuckups, one just kinda funny, another a bit scary, but ultimately funny.
First one: I was attempting to install an additional 4GB of RAM into an all-in-one PC, at a time when 4GB of DDR3 SODIMM RAM was inexplicably nearly impossible to procure. I had managed to find a store that was willing to get me a stick, and it came completely naked, no clamshell, no nothing, waiting for me just sitting out on the counter. I had to ask the clerk for a sheet of printer paper to fashion a little envelope. I get home, spend a lot of time opening the damn PC up, breaking a screwpost in the process, I stick the stick in, turn the PC on, still just 4GB of RAM registering. So there I am, crestfallen, thinking the damn thing isn't compatible or that the stick broke in transport, or that I had been duped. I turn the PC off, take the stick out, put it back in, still registering 4GB. So in a Hail Mary move, I attempt to swap the sticks; I unclip the original RAM, and it pops up at a 45° angle like a weird little erection. I sat there with the strange realization that I had not actually looked up how to install RAM in a SODIMM slot, not generally being used to laptops. It is then I learned that it is possible to stick SODIMM RAM into these particular sockets in a way that looks and feels "right" while not being actually inserted, held in place by nothing more than a rough card edge biting into plastic and the Universe's spite towards me. After fixing this fuckup, the computer proceeded to use every byte of that 8GB RAM for years until I yeeted it a week ago.
Second one: I was attempting to Frankenputer an email box for an elderly family friend from bits and bobs I had lying around, the primary donor being another friend's aging, retired PC that was reportedly being used as a cat perch by a grumpy old Persian gremlin most of the time, as the friend had moved onto laptops. I take the PC home, I perfunctorily blow some of the dust out of it, I plug it in all optimistic-like and BANG goes the power supply in a cloud of white capacitor entrails and orange fur. After hastily pulling the plug and reinserting all the escaped shit back into my asshole whence it came, I replaced the exploded PSU with another one I had, and the computer booted up like nothing happened, Windows XP with wallpaper of grumpy old Persian gremlin and all. I'm not sure what happened to that PC after stuffing it with the best spares I had, but I believe it served its purpose for at least some time before being replaced with yet another hand-me-down.