RE: Electrics burns
Ahh yes, burns hurt, electrical burns are on a higher scale. I had about 18 inches of aluminum cable vaporize in my hand. I can relate to your pain.
A little curios as to just how the wires touched and what wires were they? All of my batteries have female plugs on them so it would be hard for anything to touch them.
I was using (4) 2650 3s packs with "y" harness's to make up a 5300 6s pack. I plugged the wrong "Y" into two batteries. I heard a whistle sound and tossed the expanding pair out the garage door. So I do know it can happen.
In that tiny part of a second we loose our focus, things go bad really fast. Glad you are all right and will heal up.
Buzz.