Yes, I sure have seen one. Not going into details here-don't need any ridicule from the skeptics, but my son and I both watched it, and it was no man made aircraft like I have ever seen or heard of.
What everyone has to remember, is ANYTHING we see, that flies, and CANNOT ID., is a UFO ..... when I was a "kid" back in the '60's, I saw a "flying saucer", that I thought was going to land in the back yard ....