Boy killed by power supply

I saw this video called "Teen electrocuted while working on unplugged computer" and though I'd clean up some misinformation it is spreading.

First of all let's look at what the kid the story is about did. He opened up the power supply (like in my image) and touched the capacitors (the big black cylinders). The capacitors are basically big batteries, and will hold a charge even if the PSU is unplugged. They hold a quite big charge as well, so it can actually kill you. This is why power supplies has the warning labels on them telling you to NOT open them. I do not recommend you to open it even if you're just going to clean the fan. Just blow some compressed air into it or something.

So that's what he did wrong, and sadly that mistake ended up killing him. So what are the reporters in the video doing wrong? They are interviewing a computer repair guy, who will obviously tell you to go to his store instead. You won't get killed by simply messing with a computer. The only thing which can kill you is if you open the PSU and touch the capacitors. The rest is harmless. And I would not recommend buying a 20 dollar power supply like the man in the video said. You should always get a good, solid PSU, because if you get a bad PSU and it breaks, then it might kill all your other components as well.

Oh I just thought of another dangerous computer component (that barely anyone uses). A Delta fan might actually be able to cut off the tip of your finger. Those fans are crazy.