There has been a massive growth in churches set up by charismatic preachers in Africa in recent years, amid fears some could be fraudsters.
The pastor told the BBC that during his prayers, members of the congregation "act as the spirit comes in them".
The website of the company Yigal Mesika, which makes the "Electric Touch" machine, among other magic tricks, says: "Charge a spoon, keys or coins and watch as it shocks a volunteer!
"They will believe you have supernatural powers!"
Link - via Fortean Times