Magic Forums

I have a silver pendulum, I get some good accurate readings of my eye colour, and questions I know are true. Telling it to tell me the truth but I'm wondering a couple of things.
1. Do you have to be in a circle when using a pendulum because personally I never have.
2. Do spitrits disrupt readings? I'll be asking questions and then it spins really fast and won't stop that's in my opinion telling me a spirit is present. Or something has residual energy there.
3. What's everyone's opinions about the source of comuticating with pendulums. Electromagnet feild? Spirit energy? Our own superconsious?
Mail me on any tips on Dowsing please, Ive been doing my readings and for others but there's always new information to learn.