Originally Posted by effer

I must be a shitty reader, worked for me! pretty cool!
Now there is this psychological phenomenon called Visual Blindness.. try spotting the difference between these 2 flashing pictures. Some people will never spot the different even though it is seemingly very obvious!

http://www.cs.ubc.ca/~rensink/flicker/download/Farm.mov

Try it!
Women see it easier for some reason!