Residents were shocked when they spotted this square cloud floating over their homes which looks like a flying carpet.
The straight-edged rectangular formation was seen in the sky in Exeter, Devon - and images were quickly posted on social media .
One picture of the rhombus-shaped cloud was snapped by local Philip Mussel - and another put online by Laura Gilchrist, an employee at the Met Office.
Laura used her @weathergil to tweet on July 26: "So this evening, over Exeter, there was a rhombus-shaped cloud".
A spokesman for the Met Office said the cloud had been formed by a jet engine moving through the a pocket of air with the "right conditions".
He said: "This cloud has been formed from the exhaust of a jet engine - known as a contrail.
"In this case an aircraft has moved through a pocket of air with the right conditions for the contrail to form, meaning there is just a short section.
"The wind is blowing at right angles to (ie across) the contrail, and due to the right atmospheric conditions this is causing the ice crystals in that trail to spread outwards - creating this rectangular shaped cloud.
"It's unusual to see the cloud edges quite so well-defined as in this example but the processes involved are very common."
