I had a battery fly down and hit the header in my shortbed yesterday. I grabbed it to get it out of the way, and as I was leaning over the core support holding onto the battery, I felt electricity going through my right arm. All said and done, afterwards I felt the spot where my stomach was leaning on the core support, and there was this big red spot, and a tiny hole in my shirt there. At first I thought it was just from having my weight on that spot... but the spot is still there like a minor burn on my skin. I didn't think 12 volts was enough to do that.