Blonde Helicopter Pilot

There was a blonde taking lessons to fly a helicopter
and she was done with all of her grouund work and was
ready to fly. 

The instructor said take it up 1000 feet.  So she takes
it up 1000 feet and levels it off.

So the instructor said take it up 2000 feet.  So she takes
it 2000 feet and levels it off.  The instructor says "hmmm,
what they say about these blondes isn't really true (not
out loud).

So he says take it up 3000.  So she takes it up 3000 feet
and levels it off.  They start falling and falling and crash.

The instructor asks her what happened.  "You were doing
just fine".

She said, "Well, I got cold so I turned off the over head
fan".