@mousy,
We all have an energy aura, that is a scientific fact, but so is the study of energy in relation to medical science. So it is a theory that energy can be possibly left behind, like a memory, which would explain paranormal events.
I think, and this is just an opinion, that if you project negative energy as in anxiety, fear, intention then the result might just be that you 'feel' something.
This is actually conditioning yourself for a negative "scarey" paranormal event to happen, and you are projecting your own negative intention or negative energy into a perfectly un-para-normal situation.
If you repeat something over and over it is known as 'conditioning' and you can convince yourself of many things, including lies. So this is a choice, and you are convincing or 'conditioning' yourself and projecting an intention.
It is considered healthy to actually do the opposite.
If you choose, you can project positive energy as in gratitude, openness to understanding the goodness of our world, and to add to anything that is positive. i.e. support peace, rather than supporting hatred.
This way your intentions can follow in being positive affirmations, and you will feel the goodness of our world. Then you are conditioning yourself for a positive stable explainable life with similar experiences, projecting a possive intention into any situation.
Repeat your truth, gratitude, and positive belief.
In this way you are not adding to negative activity, you are adding to positive forces of our universe. :p