Guess where this was shot form

Nope, it has to be somewhere else, Kimberly looks different.

Kimberley hole is covered by trees and has water in it

Maybe not an air current, but maybe the gravity (or, if we want to get technical: the gravitational potential) it's different in that particular point, and thus it pulls the helicopter down since there is a force acting on it to which the helicopter was not built to withstand. But hey, don't trust me here, my knowledge in anything that has wings, or can fly it's null.

It's not extra gravity, but is air currents. Air moves around the sides of the mine creating turbulence, kind of like the swirling of waters in a stream, lowering air pressure. If a helicopter flies over it, the edges will have air moving around them causing unsafe winds making the flight dangerous. If the barely stable copter moves over the middle, the sudden loss of air pressure caused by the swirling will result in the helicopter to be seemingly sucked in. It really falls from not being able to create enough force to lift itself, but the huge mine is directly responsible.

I'm pretty much sure some of this is explained by the Bernoulli's principle. It's the shape of the mine the one responsible. But yeah, you are right, it's the pressure. Sorry, got some words and facts mixed up.

Not from that low of an angle.

Actually this is the 'Mir' mine in Mirny, Eastern Siberia, Russia.