I think she was murdered
I think she was waving her hands around in such a strange way was because she was trying to understand what was preventing the elevator from closing and obstructing it. She obviously immediately got spooked by it, maybe got paranoid someone was following her or thought it was an issue with the elevator or, even a haunting. She seemed distressed like she didn’t know what to do. Maybe she thought she would wait for staff to pass by so she could ask and then gave up realizing it was broken. But the fact she stood with her feet apart, the way she did it seems as if something moved her- or told her to stand that way. It’s as if someone told her from off camera, “don’t move, feet apart. Not that far apart. Get back in the elevator.” And then when he realizes it’s not moving- she says to him, “I’m not doing this see- (motions waving hands around) it’s the elevator. It won’t close.” And then he tells her to come a few steps forward- and then craps her and takes her to the roof- drops her in the tank and watches her die. Edit- she is talkin in both directions. There is two people present on either side of the elevator cornering her. Minimum. She is listing something on her hands 1 by 1- likely trying to reason with the killer or having a conversation with him about- perhaps the times she noticed him following her- or, the reasons she has to live or reasons to not kill her. People list their family members and loved ones that care about them before they die sometimes- when there’s a gun to their head. She was stiff just like a hostage. This was murder. They may of even threatened to kill her family members if she didn’t do as they said. I think they knew quite a bit about her, because they likely stole her phone prior. I believe it was hotel staff.