Character mistake: After Dimitri put Leena's wrist bands on for her (through the door slot), Leena said, "I want to do something nice for you; you can come in." Dimitri agreed, and Leena pulled up a chair to stand on (to be his height) and caress his face/ hair. When Leena bent in to kiss him, she banged his head against the wall several times, killing him. As a "Saarne Instituute" security member, Dimitri should know not to get sexually involved with or trust a patient, especially the most dangerous one. (00:10:29 - 00:11:29)
Suggested correction: And yet this very thing happens in real life. There are several cases of guards getting manipulated sexually, manipulated in general, or even killed by dangerous prisoners or mental patients. A part of this has to do with some guards getting in the business believing these people are misunderstood and that they can change them. As it happens in real life, there's no reason it can't happen in a movie. Movie characters aren't above real life mistakes.