I have seen a UFO but I truly don't know what it was. Could it be aliens? Sure. Could it have been a secret government tool? Sure. If I can't find out what it was, I don't dwell on it. Do I believe in aliens? Yes. Do I believe aliens spend that much time around Earth? Not on your life.

I have seen unidentified flying objects....if I knew what it was, it would just be a flying object, so...there ya go...

I’ve seen objects flying in the sky that I did not identify.

On a waterskiing trip in the Sierra Nevada Mountains a few decades back, I was compelled to sleep outside in one of the boats. With such an incredible sky from that vantage point, I became fascinated with the number of stars I could see. As I studied the sky, I noticed what appeared to be relatively quickly moving points of light; a few of those, in fact, moving at odd angles to one another as the arced across the expanse of space above me.

For years I wondered about those moving lights; what the heck were they? One day a few years back, it just dawned on me-they were satellites, plain and simple, satellites. But, up to that point, they were UFOS.

My mother swears she saw a UFO when she was a kid. She said it pretty much hovered over the house and then took off faster than a bat out of hell.

I saw a UFO when I was in North Carolina. Now, I was drunk, but I know what I saw lol. I went out on the deck at my brothers previous house with my nephew, who was also drunk, and I saw a light in the sky off to the right. It made no noise and it went thousands of yards in like 2 seconds before going out of sight. There was no blockage because my brother lives out in the middle of nowhere pretty much. No big buildings, no trees were in the way, nothing. I turned to my nephew and said, "What the fuck was that?", but he wasn't facing the way I was. So there was a drunk person (my nephew) doubting and laughing at another drunk person (me) after I saw a UFO. Take from it what you will lol

...and to clarify, UFOs are just that, Unidentified Flying Objects. It doesn't mean, or is even always implied, that it's aliens.

If you think you have seen a UFO, then what you think you have seen is a UFO. By definition it is an UNIDENTIFIED object and must remain so until it is identified. You should not say "look a UFO, I have no idea what I am seeing therefore it must me X (god, aliens, flying spaghetti monster, swamp gas, flying pigs, fairies).

I saw a UFO once, but I can't vote in the poll because none of the options fit. Based on how the length of time I watched it before it vanished, its size and the weather that evening, I believe it was ball lightning.

A few years ago in Birmingham (England) there were hundreds of sightings of a group of orange globes flying slowly in formation across the night sky. It was reported on local radio and in the newspapers.

A couple of years later, though, the sale of Chinese lanterns was banned because they are a fire risk so the fad for sending them up died out.

I have seen several Unidentified Flying Objects and all they were is objects in the air I could not identify, I doubt that any of them were objects that were either of a terrestrial origin or a natural phenomena.
I once witnessed a meteoric fireball zoom directly over me from the west to the east, a natural event, right? Well apparently not the to the others that observed it from miles away, as there was a dozen UFO reports and many were totally out to lunch. They show it hoovering, make insane high speed turns and a myriad of other strange behaviour. Amazing imagination considering I witness the event from the western horizon to the point it vaporized in the east.

I was in the armed forces in 1983 we were doing a night exercise on base on a clear night when all of us saw something big and dark fly in complete silence directly over us. Less than a minute later two f4 phantoms blasted off the runway and took off after whatever it was strangely nothing was ever mentioned about it.. If it had been an aircraft we would have heard engine noise and there would have been a report filed but we heard nothing as to what had happened

A bit pedestrian - but this is how they work.

I photographed a UFO over poole harbour. Not necessarily an alien spacecraft but not any aircraft I knw

I'm agnostic about UFOs. (But I think alien explanations are unlikely.)

When I was a child riding across southern New Mexico with my family there were several cars parked by the side of the road while the people stood and watched a moving non-airplane UFO light in the sky.

We didn't try to explain that White Sands missile base was only a few miles away. We just drove away shaking our heads.
Who knows? Maybe it was an alien flying saucer and we just didn't realize it. Lol.

I believe that they are both human-made, back-engineered UFOs, and alien ones. I have seen them so many times in Haiti, and some in the US, that I don't know how many times it was. One saucer shaped one followed our car for 300 miles when my ex and I were traveling to FL in the mid 1970s.

It once hovered so close, it stalled our car engine, but kept leaving us to frisk among the houses whenever we passed a neighborhood. It had colors running around the rim, but would also change from one solid color to another, or get as bright as a small sun, then go completely black for awhile. It acted like friendly dog, going on first one side of us, then the other, leave and return, etc.

When we passed a military base near Atlanta, it went off to hover above it. Then it seemed to turn sideways slightly, and took off so fast it seemed to blink out.

My mother and her friend thought they saw a UFO in CA. I was 4-5 years old and I just saw a glowing cloud ring in the sky. I had no idea why they were waving their hands and calling out.

I tend to make a distinction between alien visitations and the UFO phenomenon. As a pilot, I've been used to making observations regarding objects and distance. On one occasion, I along with several others witnessed an object that appeared to hover at about 10,000 feet. It was spherical and metallic and appeared to have some type of energy ring surrounding it. It stayed in one position for several minutes before exiting in a flash of light across the sky. My first thought was one of awe, but now thinking back it just reminds me of something Tesla might have been working on if he were still around today.

Yes, in high school. I don't know what it was, which is why I call it a UFO.

I once burnt my liver and onions so badly that I could not identify the remains

Weird

I have seen a UFO. And then investigated until I discovered the answer.

The encounter was astounding and convincing. I could not imagine a mundane answer, but there was.

More later...

Also had no idea a launch could look like this: [nbcnews.com]

It was just before Christmas and I posted "Santa?". I mean reasonable assumption right? lol

Years ago sitting in our driveway one night with my parents watching fireworks a few miles away - I saw something in the night sky that I suspected was a helicopter with a search light. I have no training in this but it looked about right.

I immediately said "Lay odds that the whole town is going to have reported flying saucers tomorrow?". Yes we all chuckled. We were too far away to hear any sound so it was indeed my guess.

The next day the town paper reported multiple calls to the Police Station reporting UFOs. In fact Flying Saucers.

I've never seen one or at least I wasn't aware that I had. I suppose it's plausible assuming we're not alone in our universe but if even half (or even less) of the sightings were true it's bloody crowded around our insignificant little planet.

I have seen a UFO, but couldn't vote as the option isn't there.

It was (or appeared to be) flying and I don't know what it was.

Thus, I managed to conclude that I has seen an unidentified flying object.

Simples.