The ability to perceive the things that are discussed in this documentary come to people two ways: You are born with a stronger ability to perceive energy OR you gain the ability to understand and perceive energy through a life-challenge (trauma). I have had a moderate amount of awareness but after the death of my daughter those abilities grew exponentially, beginning in the hours before her death. I woke out of a sound sleep and KNEW that something horrible was happening or going to happen. I paced for hours in the middle of the night, then that intense feeling released and I was able to go back to sleep. That aligned with the exact time of my daughter's dying and death. In the years that followed I have experienced things that I would have absolutely discounted before. These things are very real.
The low reviews speak of this as "scientific nonsense" because they lack the ability to perceive what is being discussed, in the same way that fundamentalists cannot begin to wrap their minds around evolution. Just because someone has no knowledge or understanding of a concept or a truth doesn't make it untrue. Remember what Shakespeare said: There are more things in heaven and earth than are...dreamt of in your philosophy.
The scientists interviewed in the documentary all have serious credentials and, being of a scientific mind, they are endeavoring to understand *something* that they have experienced...frequently to their shock.
If you are experiencing these things or you have a desire to develop these abilities you will find this a solid and fascinating documentary.