To ascribe such 'sensing' to something preternatural and unprovable is a very slippery slope to my mind.
Literal Blindfolding or simply not being looking in the direction of the 'threat' does not prevent you picking up cues from your environment to the existence of that threat. Humans are much better at this then we give ourselves credit for.
A good example of this is a study I read ages ago, about the ability of men to sense the prescence of women in a building (a warehouse if I remember rightly), without any of what we might term be 'normal' clues. In the end it was determined that the test subjects subconsciously picked up on natural scent molecules (the infamous phermones) as they were more 'accurate' when the women were around the peak of their fertility cycle.
Literal Blindfolding or simply not being looking in the direction of the 'threat' does not prevent you picking up cues from your environment to the existence of that threat. Humans are much better at this then we give ourselves credit for.
A good example of this is a study I read ages ago, about the ability of men to sense the prescence of women in a building (a warehouse if I remember rightly), without any of what we might term be 'normal' clues. In the end it was determined that the test subjects subconsciously picked up on natural scent molecules (the infamous phermones) as they were more 'accurate' when the women were around the peak of their fertility cycle.