Perpetuum mobile idea
So, This goes again to the future chakra of 'energy from gravity' idea, but what if this works? Imagine the following: We can harvest energy from a spring. We have a trampoline with uses these springs which we harvest energy from. We have a metal ball bouncing on this spring. Above it sits an electromagnet powered by the springs. If the energy harvested by the springs is big enough to power the electromagnet, and it has some surplus energy caused by gravity's pull on the ball, we have an infinite power source. Get it?