Video of a 400 pound lion at a zoo in Chiba, Japan sneaking up on a little boy the moment he turns his back has gone viral. The startling video seems to confirm a previous viral video that was filmed at a big cat rescue sanctuary.

It shows a variety of big cats doing the same thing the moment a person turns their back on them. You can watch it embedded below.

In addition, there was also a New York Times article from 1989 that talks about workers in India wearing masks on the backs of their heads to curtail Bengal tiger attacks that had been occurring in the area.