I did this too! I picked up the wrong wire - I was installing a phone extension for my Nan - and stuck the wire in my mouth to strip it, as you always do as a kid. I was sitting cross-legged on the floor and got "blown" backwards across the room just like in a movie. I'd been shocked a dozen times from the 240V mains due to prior misadventures, but that was the worst shock I'd ever had. I couldn't taste anything for four days afterwards.