Curious what the strangest phenomenon, natural or unexplained, you've personally experienced is? I really only have 1: when I was a young kid, maybe 8 or 9, i was in the backyard with a neighbor girl who was a year younger and we saw what I think was ball lightning. It was a glowing floating orb about the size of a medicine ball. They are often reported to explode, but this just kind of bounced off in to the trees and out of sight. It was floating near power lines and I know there were storms in the area, but it wasn't storming at the time. Anyone else seen ball lightning? A friend who lived near where we saw this, described something else like ball lightning, but it was inside their house. Both seem fairly consistent with descriptions for ball lightning although there are few "documented" incidence.
I've never had any experience with a ghost or UFO, although I've have good friends who I believe are truly convinced they have seen both. Anyone willing to 'fess up if they have?