Lee, post 14,
I think that you did forget to mention all experimental conditions during your research. Was that not the time that you swallowed just before the actual optical experiment a small glass of yellowish coloured liquid, causing a rolling sensation in your eyes and your brain??????
Gijs van Ginkel
You might just be right Gijs :-O
But I would need to repeat the experiment to be sure within 3 standard deviations.