Ball lightning

Ball lightning is a very interesting phenomenon where a ball of electricity forms floating varying slightly in size shape and color. Accounts of ball lightning have been recorded in various places and all describe similar things bright floating glowing orbs. There is no 100 percent known reason known for why ball lightning occurs but there are some theories. The most prevailing theory is that when lightning hits the ground and strikes particles like silicon it causes the silicon to turn to a gas. When the gases cool down the silicon vapor becomes dust and that dust is then attracted to each other because of the lighting charge. The dust then clumps into ball shapes and creates the ball lighting. this can also happen with other materials but silicon seems the be the one with the most evidence behind it.

https://science.howstuffworks.com/nature/climate-weather/atmospheric/ball-lightning1.htm

"This theory also suggests materials other than silicon -- such as aluminum and iron metals -- may also cause the orbs, and that any atmospheric discharge, not necessarily lightning, may explain why ball lightning has been sighted near power poles, electrical fitters, and even active faults."