As a teenager I spent many days in the woods of my area hunting squirrel, quail, deer, and turkey. Back in the days before turkey hunting became "big" business.
On one particularly fine morning, my father and I were set up on the edge of a river bottom. We had eased into this area early in the morning on a scouting trip. the idea was to call a time or two and see if we heard turkeys respond. Daybreak came along and a gorgeous day was beginning when I heard a "woosh" and my father went to waving his arms. ya see, we were in full camo, sitting with our backs to a holly bush and trying to be very still. Apparently we were doing a good job at it as a redtail hawk mistook the crown of my fathers head for a perch.
I dont know who was spooked the most, me seeing this massive bird sitting on the old mans head, the old man wondering what was attacking him, or the hawk whos' perch decidied to rock and roll.
the hawk finally let go on the old man and flew maybe 20 yards to a large oak tree where it sat for the next few mins, and I swear, laughing at us. It chirped/laughed and then flew off looking for its next meal.