The dumbest thing i've done with my computer

Usually i am not doing stupid stuff when it comes to computers,because i know what the fuck i am doing so i can't mess up at software level.But when it comes to hardware,i tend to make some of the stupidest mistakes.For example, after i first got my pc i was not interested in whats actually inside it,and i left it untouched.After one or two fucking years i decided to open it (in this period i got a storage upgrade, a relative installed an ssd instead of the two hdd's i had) and i literally found a sata cable connected to the motherboard and the other end was in the air,than i found the IDE literally trown in the case.Got them out and blowed the dust ouf of the computer.

Why tf i was not carrying about hardware?And that is not the only dumb thing i did.

Another one was using windows.WHAT the fuck was wrong with me???