About ten years ago I had to change an AM radio stations back up generator battery. It was like 3 car batteries fused into one big heavy mother fucker.

The large wrench I was using slipped out of my bad and skipped across the terminals. For some reason unknown to me I pulled my hands back as soon as it slipped. So I was okay but that was a HUGE spark and the terminal that hit the middle of the wrench carved out a huge hunk of the wrench like it was warm butter.

Electricity will fucking kill you