ok, my buddy sent this to me and I haven't been able to figure it out yet so I thought I would use the collective genious that is PPOT for help.
(I'm sure this is old as I am usually 2 years behind on getting things like this.)
count the men. Then wait for them to change and count them again.
Where does the extra man come from?
or try this link if pic doesn't show.
http://www.moillusions.com/2006/05/count-people.html