From his official website :
"Fernando is very cool about showing his emotions, just a little euphoria, and after a while he will usually give a hug. He acts as if he knows everything. However, things are going on inside him. After winning the race in Hungary in 2003, he went among the computers and shouted “what I have done, what I have done” and then he went out with a completely different face. He does not show things on the outside, but he clearly feels them. Fernando knows how to switch off. Pressure does not affect him because he “closes” the door."