In the strictest definition of ‘unidentified flying object’, yes!
I think it was ball lightning, but had never heard of such a thing at the time. I was a child, on my family’s back deck (second floor level of a house), and it flew horizontally past me and across the back of other houses. It passed very close to me. It reminded me of lightning but was a ball but those two factors didn’t make sense to me because, again, horizontal. And ball.
When I later read a description of ball lightning, that resonated with me. But technically it’s still ‘unidentified’ since who knows what a child alone really saw?
Anyway.
TPAM has special teacups just for tea.