Mind Puzzle Chain Mails

I recently received an interesting forwarded e-mail with various mind games.... Some samples follow below. I think that these successfully demonstrate how our minds can trick us. How many details and alternate views do we gloss over in our daily lives?

Count every " F " in the following text:

FINI SHED FILES ARE THE RE
SULT OF YEARS OF SCIENTI
FIC STUDY COMBINED WITH
THE EXPERIENCE OF YEARS...

HOW MANY ?

THERE ARE 6 -- no joke.

READ IT AGAIN ! The reasoning behind is further down. The brain cannot process "OF".

The following are a few pictures that were included. Each picture contains two words. I'm uncertain of the source of these pictures nor copyright status...