I had written on that thread about my friends cat

I have heard all my life that they can see them (meaning things we can't see) and I have a friend that I use to work with that swears one of his cats sees something in his house that scares the daylights out of him (the cat) and makes the cats fur stand streight up. It is a place by his staircase that is where the cat sits and watches for hours, he growls with his fur standing up then bolts in the oppsite direction... and this happens a lot. When the cat wants to go upstairs, he said he will walk through 2 rooms to get to the staircase, rather than use the hall where he "sees" this whatever it is.
My former co worker use to tell us stories about Gator's lates adventures and the staircase ghost... odd thing is, he has 2 cats and only this one is scared of the spot by the staircase.