Why didn't she kill the man stuck in the pipe at the end?

Was he not jammed fast with no way of getting out? She knew this and just left him to die a long, slow and horrific death. We all want to SEE these evil characters die and feel a bit cheated when we don't (or they don't get the comeuppance we think they - and the audience - deserve), but a bit of imagination with this one works well enough when you consider his predicament.

The movie showed earlier that Goran was claustrophobic. Viktor tells him derisively to go after her. Instead he orders the young soldier with headphones to go in and makes a comment to the effective of "I'm not --- going in there!" She couldn't have heard it being deaf, but she could see the panic on his face in the pipe. Leaving him to die alone and unheard as he slowly dehydrated in the pipe was a much more cruel and poetic death.

Kill him with what?

How was she supposed to get back in? The doors were locked remember? Even if she was able to go back in with the workers, I don't they would let her start operating their machinery. I would have liked to have seen him gruesomely suffer though.