If you have a weak heart, this video is not for you. This has been making rounds on the Internet after the Los Angeles Police Department released it to the public, days after the unfortunate death of Elisa Lam, a 21-year-old student.

Lam was found dead in the Cecil Hotel's water tank, after the guests found their water supply smell weird.

The police initially ruled the death as "accidental due to drowning" but some details do not seem to add up. You can see for yourself in this video what happened before her gruesome death in the rooftop of the hotel. She tried to enter the elevator and was seemingly fazed by 'something.' She panicked and tried to touch all of the elevator's buttons like someone (or something) was trying to chase her. The elevator did not budge and the 21-year-old student was seen to be talking to something inside the elevator but this remained unidentified.

As if things could not get creepier, at 1:57 in the video, you can see Lam do unnerving hand movements as if possessed by something. She started to walk out of the elevator (still doing the eerie hand movements) when coincidentally, the elevator started to function as normal. This is the last time Lam was seen alive. Because the next time the police found her, she was already two weeks dead. Her corpse left to decay in the hotel's water tank.

The autopsy showed no sign of drugs or alcohol in Lam's system. Several questions were left unanswered: Why did Elisa go to the rooftop of the hotel? How did she actually gain access to the water tank, which is normally sealed shut with a heavy metal lid? The hotel has had its fair share of sordid history. Lam's was only an addition to its ghoulish reputation.

The chilling story of Lam was somewhat familiar to the narrative of the movie, "Dark Water." Starring Jennifer Connelly and Tim Roth, the movie revolved (uncannily) around the same plot, where Dahlia (Connelly) noticed dark water dripping from her apartment's ceiling, which she later found out it was due to a young girl's tragic death in the apartment's water tank.

Watch the video here: Elisa Lam Elevator Surveillance