F you!

A couple brain puzzlers found at reader's blogs:

from 12am:

Count every "F" in the following text:

FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS...

HOW MANY ?
.
..
...
....
.....
......
....... 3?


WRONG, THERE ARE 6 -- no joke.
READ IT AGAIN !

...more here...

And reverse_vampyre provides a link to one surprisingly challenging IQ tingler...