"It's a great thing to start the weekend in such a strong way and I've had a good sensation and feeling with my bike from the first moment today, " Lorenzo said on www.motogp.com.

CNN: Lorenzo pips Rossi in Czech MotoGP practice

The fact that this last feeling is so common in depression explains why being "stressed out" is such a good marker for major depression.

CNN: Stress has taken over: How can I turn my mind off?