![Scientist's outside experiment with Tesla coil causing lightning](http://static.sciencelearn.org.nz/images/images/000/001/959/full/Seeing-electricity20160921-23281-3235ym.jpg?1674167255)
Using junk and materials from hardware shops, Peter Terren carries out amazing experiments with a Tesla coil – a machine (transformer) that turns electricity into streams or sparks that fire directly into the air or strike nearby objects like lightning.