It's never a good idea to stand directly behind a jet as it takes off - particularly when the runway is a beach.
Tourists on the Greek island of Skiathos learned this the hard way, as they observed a Boeing 757 departing for the UK.
As they gathered to watch the Thomson Holidays plane take off, they were blasted with sand and debris as the jet's engine created a sandstorm.
Footage posted on YouTube shows holidaymakers in swimwear waving at the plane, before the sandstorm forces them to run for cover, their belongings flung across the beach.