Skiiers in Sweden believed that a UFO was hovering above the slopes on Thursday - but it turned out the apparent spacecraft was actually a cloud.
The cloud appeared over ski resorts Are and Duved and many of those who saw it took to social media to express their surprise, The Local said.
However not everyone was fearful, one witness telling STV: "I thought it was pretty cool."
It was later explained by experts that what people were seeing was in fact a lenticular cloud.
They form over mountain peaks when air is forced to rise because it hits the hillside. As the air cools, it condenses to form a cloud.
Take a look at photos of the cloud below: