This funny but frightening video shows just how deadly a big cat can be when your back is turned.
Animal welfare campaigners made the video showing the predatory instinct of tigers, lions and cheetahs is strong despite captive surroundings.
Big Cat Rescue have proved just how dangerous big cats can be, even if they act like friendly pets.
Surprisingly, the big cats look like scary hunters as they creep up behind the backpack-wearing star of the video.
When they recognise his face they relax and look like they would never strike someone they knew.