I'd actually like to learn what acts come with pendulums. I've only heard about it a day or so ago (and then read your post Tukaram), but nobody mentioned a name if an effect that uses a pendulum.
I'm fairly new to the mentalist game, but having an old gypsy type lady introducing me to pendulums at a young age, I always thought they were some strange form of magic because the things could answer my questions...
Is there any direction you can point me to in order to see the power of the pendulum? I've heard stories of Impromtu routines using pendulums, where the mentalist created a pendulum on the spot by using a ring and a shoe string, and got amazing reactions still. That alone has me interested, but what happened during the routine is a mystery to me.
There's a more or less natural phenomena that occurs when someone holds a pendulum. They try to hold it steady, but minute movements (even a heartbeat) will cause it to swing slightly, going from a straight back and forth to a circle and back again. If you time it right, you can use this natural change in pattern as if you were controlling the spectator's actions.