I was in my first class as an apprentice and right off the bat the instructor taught us how electricity can kill you. He even showed us some grisly photos to drive home the point. When I learned it only took between 0.1 and 0.2 amps to kill you, I was pretty surprised. It's at that amperage the heart goes into ventricular fibrillation. Of course the current has to pass through your heart - hand to hand, head to toe, etc - but if you "get caught up", where your muscles contract and you can't let go, better hope someone is nearby to knock you off.
While it is tough to get a 240V shock in a residence, 240V will give you a start of something shorts across it. My most memorable experience was not with 240V but with 277V. We were working an office remodel. The foreman, who had advanced beyond his capabilities, had gone around cutting wires in JBs without capping them. I was on a ladder sliding a 2x4 fluorescent troffer from one bay of the drop ceiling to another. The inside of my arm was resting on the grid. Suddenly the room started flashing (it was my vision, not the lights) and I felt burning on the inside of my arm. I knew the grid was grounded and that I was getting shocked made no sense. Then it stopped.
I looked around and right where my temple was, a cut wire stuck out of a JB. It was live 277. I got down off the ladder and released the charge my body had just absorbed onto the foreman. Now his eyes were lighting up.
“Travel is fatal to prejudice, bigotry, and narrow-mindedness..." - Mark Twain