Although we take this for granted, the cancellation of positive and negative charges is quite remarkable, and has been experimentally checked to 1 part in 1021. (Of course, there are local imbalances between the charges, and that's why we have lightning bolts. But the total number of charges, even for thunderstorms, adds up to zero.) If there were just 0.00001 percent difference in the net positive and negative electrical charges within your body, you would be ripped to shreds instantly, with your body parts thrown into outer space by the electrical force.