Two swans smashed into a packed passenger jet just seconds after it left Gatwick Airport, causing the plane to quickly make an emergency landing, reports say.
A jet hitting a swan at 185mph delivers roughly the same kinetic energy as hitting a concrete wall at around 30mph, they explained.
The two birds cracked the windscreen of the flight as they crashed into the plane at around 185mph.
The Tui flight bound for Cape Verde climbed to around 1,000ft before pilots were forced to make a distress call.
The plane reportedly had to be escorted from the runway to the stand as the two pilots inside were unable to see out.
