I've gotten buzzed with a 10,000 volt furnace transformer a couple of times. Low amps, but no fun at all. You test the things by placing a screwdriver across the terminals, and then pulling it away. A good transformer ought to throw a two-inch arc. Just make sure not to have your fingers too close to the metal on the screwdriver! Ouch!
A coworker was testing one once when he leaned a little too close to the metal workbench to which he'd accidentally grounded the transformer. The thing arced across to his pants and bit him on the end of his penis.
(Not the penis bit, that's hardcore.) Try 200,000V. Obviously low amps because I'm still here. The ability to pull 6" lightning from your fingertips is awesome. It was a freinds home made Tesla coil used to power a linear particle accelerator. Back in the days you were allowed to make stupidly dangerous science experiments.
But I've been bitten by 240V + plenty current when I was undergraduate engineer. Not so much fun..it's a horrible feeling if it lasts long enough to realise what's happening...which it did.
As for the latest image, sutures in a human skull. In particular the Coronal and Sagittal sutures?