Ciliates are microbes--one cell only, no nervous system, no brain. But they have hairs around their cell membrane that sweep the water and allow them to swim. When these two paramecia realize that they have been surrounded and cannot escape, their reaction looks a lot like panic.
Here's a white blood cell pursuing two bacteria and destroying them. How do they move: How do they know where they are going? How do they sense the presence of the bacteria in order to move toward them?
It's a scientific fact that all life depends on killing. It's my belief that all life is sacred.