Sometimes you have a camera being carried by an operator hooked onto a wire and the wire carries it across more land and it's unhooked again that operator runs with it.
Ellen, get him hooked up to a monitor! Someone page Dr. Howser. Get the patient to hold still, I can’t get a pulse! Okay, he’s on the monitor. His BP is falling! He’s flatlining!
In fact, they're pretty determined, and if they're trying to get up somewhere, they grip onto the stones with their slightly hooked bills as well as their nails when the surface gets very steep, nothing stops them.