One time I needed some free space on my PC so I connected the USB-IDE converter to the HDD, connected the USB cable to the converter, (this is where the magic begins) and plugged the molex cable in. As expected, my dumbness resulted in my PC shutting down. I thought "oh you dumb shit its not sata lol youre so dumb now lets connect the cable and turn on the pc lololo" and secured the molex cable and pressed the power button.

Apparently, the spark that happened when I first stupidly connected the power cable while the PC was on caused a cap to fry, resulting in a flame that was more than 17 inches high that came from a cap on the HDD.
So I pressed the PC's power button for 4 seconds instead of plugging out the power cable and the PCB already turned black by the time the PC turned off.