I use this[1] from the BBC where I often get in the middle stripe (0.2833). But on this page I get 310-330ms.<p><a href="http://www.bbc.co.uk/science/humanbody/sleep/sheep/reaction_version5.swf" rel="nofollow">http://www.bbc.co.uk/science/humanbody/sleep/sheep/reaction_...</a>