Meanings of zigzagging over in English

The drones had scattered and moved forward, zigzagging over the rocky terrain: a search pattern.

Sari and I both started to run to the tunnel, our lights zigzagging over the low entrance.

With that boom, Gold-Eye shot out like a rabbit, jinking and zigzagging over the railway lines, frantic with a terrible realization.

Presently the rain began to descend more heavily, and clouds collected, and flashes of lightning darting from them went zigzagging over the ground.

"Hang on," Ian said, distracted by the shape, which he could see was zigzagging over the water.