So-
in the spirit of all things worth doing are worth doing again...I took an ER Doc with me to the gym last night (CHEST) and decided we were going to try and reproduce my symptoms at the end of my workout.
We figured out the following...
I tilt my head up at more than 30 degrees and have heavy strain or valsalva (i.e. heavy weight, end of set etc), my neck musculature does indeed decrease my blood flow to my melon. This was only the case though when I focused "up" at an angle.
He thought it quite interesting to watch my neck "swell" as he put it and see my body's reaction. After a few instances, he was able to predict within a couple of reps when I would start getting light based on the look of my head stem.
Solution will be to (of course) do those excercises more "lightly". I KNOW you didn't think I was going to say complete avoidance....c'mon!
Thanks for the input folks...
Eagle