Something looking like a UFO made a sudden turn then disappeared into the distant sky.
UFO stands for unidentified flying object.
Do you believe in UFOs?
We lost sight of the UFO right away.
I saw a UFO.
I have seen a UFO before.
What is a UFO?
The pilot hinted that it might be a UFO.
A UFO is flying in the sky.
No one really knows what a UFO is like.
I had a glimpse of a UFO in the night sky.
Some believe in UFOs and others do not.
The UFO, with a zigzag movement you couldn't think of as being a plane, flew off into the mountains in the east.
She stared at a UFO in silence.
If UFOs were to attack the earth, what would become of us?
He saw a UFO flying last night.
Have you ever seen a UFO?
"Strange isn't it. By the schedule around now we should have all witnessed an UFO, and united in researching." "From 'witnessed' it's never gunna happen."