One thing I really notice, and maybe some of you have too, is that after I've been sitting all day on a nice breezy day, when I lay down at night to go to sleep, I still have the feeling of the tree swaying back and forth.

I think it has to do with your equilibrium, but I know I've been hunting hard when it's been 2 days since I've been in a tree but can still feel it swaying in the breeze.