Let's Make Robots!

but

Your most lethal component in your work room

So today I recieved my huge capacitor, 10,000UF @ 450VDC, this thing is freaking huge. I mean it's like I'm overcompensating for something... Anyways, what is the most dangerous component you own? This is probably it, as it has enough power to remove limbs. Heres a picture too.