NOPE no halucination. coz that shit happens to everyone just most dont want to beleive its existence, and infact it is real it is very real that there are "shadows" around the place

there is one theory although i think it bullshit is that "everyone experinces outer body experinces, and the shadows that peopl see are merely the conciousness of the people who have OBE"

which i think dosnt sem quite right, i'd be willing to bet these mysterious annoyances are more of actual things not jsut someones reflection. after all how much do we really know about our surroundings. THe anser is a whole lot less than what we think we know