Ball lightning

From "Ball lightning: the coolest thing you’ve never heard of":

Ball lightning looks like a floating glowing fuzzy ball of light, usually a few inches to a few feet in diameter. It floats or moves around rooms, airplanes, open areas – and occasionally through solid objects. It usually lasts for a few seconds or, rarely, minutes, and then disappears, silently, or with a popping sound, or sometimes even a loud explosion and a surge of electricity through nearby objects. This surge often sets on fire, blows up, or electrocutes nearby objects – everything from cows to VCR players to people. Ball lightning usually appears under in the same circumstances as regular old lightning: during major storms, flying through clouds in planes, etc.

Ball lightning is super cool!!