Justin Bieber was taking helicopter lessons. The instructor said, "I'll radio you every 1000 feet to see how you're doing."
At 1000 feet, the instructor radioed him and said he was doing great.
At 2000 feet, he said he was still doing well.
Right before Bieber got to 3000 feet, the propeller stopped, and he twirled to the ground. The instructor ran to where he crash landed and pulled him out of the helicopter. "What went wrong?"
Bieber said, "At 2500 feet, I started to get cold, so I turned the big fan off."