This is my interpretation of what was going on with Elisa. It is the only one I could think of that is consistent with all her actions, gestures and expressions in the video.
I hope you read with an open mind and do not jump to conclusions before reaching the end.
As to what caused the state of mind she was in, it could be drug-induced hallucination or some other things. If you like to know more about ambien-induced sleepwalking, ThinkHard posted an excellent description in post #29 of thread #1.
To me, far from trying to get away quickly, she was actually expecting "people" to join her in the elevator. I place people in inverted commas because we cannot see what she was seeing in her mind. So all my references to people or persons are what I think she was experiencing.
These are the reasons why I am saying those who believe she was trying to escape got it wrong:
Look at the body language - the casual way she entered the elevator, the roundabout swing of the arm instead of hitting the buttons straight, and pausing a second or two to peer at the panel before meticulously pressing each button one by one. Short-sighted yes, but why waste precious time if rushing to escape?
And on her re-entry, why go through the same buttons in the same sequence 3 more times if the first 2 times already did not work? Why not try pressing the other buttons to see if they could get the elevator moving?
So, she was not trying to get away as quickly as possible. On the contrary, my theory is that she pressed the floor buttons for other people whom she was expecting to join her in the elevator. She pressed the Door Hold button to keep the door open for them. And she was expecting 4 of them.
My first thought was that the 4 of them were adults. But I could not tie this with the rest of the video, especially the hand gesture part, until I read a psychic's reading that she was looking for something low because of the way she first stooped to look outside.
Then it dawned on me that she was waiting not for 4 adults but for 4 little children, and then the whole video made sense. She pressed the 4 floors for them and waited for them to show up. They didn't. She thought they were cheekily playing hide-n-seek with her. So she responded playfully in kind, just like how a 20+ age babysitter would play with her young wards.
(She pressed 6 buttons in total and they were for floors 14, 10, 7, 4, M and Door Hold. The 14th floor was where she was on so it was redundant, leaving floors 10, 7, 4 and M for the 4 kids.)
Failing to see the children, she stood outside waiting a long while and they still did not show up. Bewildered, with hands placed on head, she came back in wondering if she had pressed the button sequence correctly. She redid the sequence 3 times to be sure (indicative of a code or a ritual, or of the 4 floors for the 4 children), and then walked out seemingly assured again. (Look closely at all her body language clues and facial expression.)
This time the children appeared on her right and she was immediately relieved to see them, placing a hand to her chest and flashing a smile. She looked towards them and patted each of them as they entered the elevator one by one (a total of 4 pats). Note how the patting motion moved towards the elevator, as if she was placing her hand on the child's head or shoulder as the child entered the elevator.
(As for the splayed hands, they can be explained as exaggerated gestures caused by drug-induced hallucinations, much like a normally shy person talking loudly and uninhibitedly under the influence of alcohol.)
Next, she turned towards someone on her front left and seemed to be relating or reporting with much joy what she had just accomplished, while counting out with her hands the 4 children or the 4 floors that she had pressed the elevator buttons for. Her bouncing or skipping motions were manifestations of the joy she was feeling.
(Yes, she counted 4, not 3. Counts 1 and 2 are subtly in close succession between 2:12 to 2:14. Watch that segment again.)
Finally, she paused for a few seconds as though she was listening to some instructions or waiting to follow behind the other person. Note that she did not step directly towards the left but her right foot stepped forward first towards the center of the corridor. The left foot then stepped forward to directly in front of the right foot. She then made an abrupt turn to the left causing the right foot to cross the front of the left foot in such a way that the final thing we see of her was her left heel.
So, does the above make sense? Well, it may not make 100% sense to us, but to her in the whatever state of mind she was in, it could be what she was going through. Of course, I admit that it is all highly speculative but it is the only explanation I could find that is consistent with all her gestures and expressions in the video.
There are one or two unanswered questions. Firstly, why was she on the 14th floor? I don't think any of us can answer that until and if we can get to see the video of how she got there in the first place. Secondly, how did she end up in the water tank? This we will have to wait for the conclusion of the police investigation. But what if there was no foul play? Then you might want to read my post #534 on the startling discovery I made when I googled the elevator button numbers 14, 10, 7 and 4 just to see whether they could mean anything.
Thank you for reading and keeping an open mind.