Imagine standing waist-deep in water, posing for a photo while stingrays teem beneath the surface, when suddenly something very large and clammy becomes draped around your shoulders.
How would you react?
Probably like the three women in the accompanying image, whose expression changed from joyful smiles to collective horror after a man, whose head is barely visible in the photo, lifted and placed a large stingray onto their backs for a "photobomb" prank that has gone viral.
The image, source unknown, reportedly was captured at a Cayman Islands tourist spot known as Stingray City, where swimmers can feed the stingrays pieces of squid.
Stingray City Trips states on its website: "The Stingray City Sandbar is a fun place and is suitable for everyone. You may be surrounded by more than two dozen 'tame' Atlantic Southern Stingrays that enjoy the company of humans."
Yes, the stingrays are tame. It's the human jokers you have to watch out for.