Zebras looking at a predator
This small group of four zebras just got frozen, whenever they recognized an adult male cheetah passing by. Even though the cheetah was not willing to hunt, zebras did not move at all, until the cheetah moved to a safety distance from them.
It all happened in Masai Mara National Reserve, Kenya. We recognized the zebras at first. We tried to recognize what do they see and we could point the cheetah.
Just like humans. If someone looking at something continuously, we will try to look at the same thing. If a group of people looking to one direction, we will immediately look there too.