
There is a host of long standing Native American spiritual/ritual warnings concerning those who either see or, even worse, have an accidental up close encounter with BF, after which bad luck or serious misfortune is said to befall the witness. Whether this acts psychologically as a self fulfilling prophecy because something bad is 'supposed to happen' -- by way of the power of suggestion -- or whether there is something otherwise mysteriously operating here, such as the notion of BF's infrasound being able to carry a message of malevolent intent (sound carrying intent, now that is spooky stuff, although quantum physics describes such stuff today using the term 'entanglement'), we will probably never know. But as a real psychological and emotional phenomenon BF induced PTSD is a result, in varying degrees, for many who have encountered Mr. Fuzzy. Every other BF forum I have sampled over the years seems to have discussed this issue at one time or another.
Drs. Bindernagel, Meldrum and others have mentioned the weird sensation reported by researchers in Africa who for the first time see a large biped approaching them. There is nothing quite like it and for some reason there often is an accompanying moment of terror, perhaps because we have been taught that man is the only animal in the modern world that walks upright all of the time; or perhaps because a man alone without modern weapons for protection (think primordial memory buried deep within our genetic makeup) is no match against almost any anthropoid ape, given their superior strength and agility. Seeing another upright, hairy, creature which is clearly not man is simply unnerving.
I personally know of at least one serious case in this regard which required considerable medical intervention. In some cases the resulting psychological and emotional trauma manifests in actual physical symptoms and problems. Anything powerful enough to span the distance between the emotional and the physical is powerful, indeed.
Opsimath