If you were standing at arms length next to someone and each of you had 1% more electrons than protons, the repelling force between you would be enough to lift a weight equal to that of the entire earth!
I read this one from my Feynman Lectures on Physics: Vol 2 that I got with some birthday money. I bought the entire box set and it's really nice. Back to the point: the force that you would see is called the electromagnetic force and more precisely, in this case, a Coulomb force and it is the force that is observed between two charged particles. As you may already understand from magnets, like charges repel and opposite charges attract. In your body you have, on average, 7,000,000,000,000,000,000,000,000,000 or 7*1027 atoms. Each atom is composed of a specific number of negatively charged electrons, positively charged protons, and neutrally charged electrons. There is such a perfect balance within your body that you have the exact same number of electrons and protons and therefore you don't radiate a field around your body that affects others electromagnetively. But if you each had more electrons than protons, you would each have a total negative charge and repel each other.
