Last time I had a MRI I worried about the stailess rods in my back and the stainless mesh in my heart.
Good thing they were a type of stainless without ferrous content.
Another interesting phenomenon happens when you run 4,160 volt current phased between plates spaced about a foot apart with a candle and flame in the middle. When the circuit is complete the flame from the candle will bend to a 90 degree right angle due to the rearranging or exciting of the atoms in the air.