Errmm... how much did that cost you?
But yeah... It's always when I play minecraft that my laptop's fan whizzes at high speeds. I have a plastic support that keeps the laptop off of my blankets on my bed, because that was what contributed to several overheats.
The transformer does get a little hot, but not enough to start any fires, but it does get to the point where it could burn my hand if I held it for too long...