Blonde's Helicopter Lesson

A blonde was taking helicopter lessons. The instructor said, "I'll radio you every 1,000 feet to see how you're doing."
At 1,000 feet, the instructor radioed her and said she was doing great. At 2,000 feet, he said she was still doing well.

Right before she got to 3,000 feet, the propeller stopped, and she twirled to the ground. The instructor ran to where she crashed and pulled her out of the helicopter. He asked her, "What went wrong?"

The blonde said, "At 2,500 feet, I started to get cold, so I turned the big fan off."