You are not alone.
Years ago at a family picnic, I left the group and went mountain climbing. I sat down to rest and looking up in the sky, I saw a silver object stationary in one spot. I couldn't guess its size because of lack of perspective but it looked to be the size of a qurter held at arms length. I ran back to the group (it took about 10 minutes) and when I told my Dad about it he scoffed and said I was hallucinating.
I know what I saw and watched that thing for at least 5 minutes. It moved slowly at first then zipped off at a fantastic speed.
I'll swear on a stack of bibles that it is the truth but seldom mention the event.
I once saw one of these or that answers the description pretty well. I happened to have my telescope with me and got a good view of it including when the balloon exploded and put pieces all over the field of view. To the others it looked like it merely disappeared.