That happens to all of us I think. I was bowhunting this year on a steep hill overlooking a field. There is a draw that runs behind me that is level with my sitting position on the tree due to the incline. I just "felt" something was behind me about 15 min before dark one night and turned slowly to look. Sure enough there was a nice 7 point and scrub 6 point looking in my direction at about 50 yds. They didn't see me I don't think but they knew something wasn't right and skirted my area.
It was so quiet that evening that I was scared to even breath hard, and I didn't hear a thing as they walked in. Unbelievable.