In reply to H Veeder's message of Fri, 9 Aug 2013 11:32:37 -0400: Hi, [snip] >what determines the speed of this wave? > >http://www.youtube.com/watch?v=GfX0j7-fLmk
Human reaction time. People react to what those around them are doing. Herd mentality. > > > >Harry Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
