An electron found itself in distress. It was attracted to the proton, but it could never get close enough to it, thus there was always some amount of trapped energy. It thought, "I wish I were a neutrino, then I could stay with the proton and give out a certain amount of energy."

However, a neutrino passed by and told the electron, "Once you became a neutrino, you'll lose all the electric potential energy you currently have, and there is no way of you releasing any potential energy from that proton."