After a few warm-up laps, Sanna pulled over and we switched places.

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Fabrizio Sanna and colleagues at the University of Cagliari in Italy injected oxytocin into particular parts of the brains of rats and induced yawning, or blocked the effect by injecting an oxytocin-blocking chemical first.

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Racer Sanna explained from the driver's seat that to go above 200 mph (322 kmph), I needed to be in the far outside lane because, of the four track lanes, it is banked the steepest (12 degrees).

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Earlier Sanna had explained that overcast skies and no wind made for a good top speed, but the air temperature, 28 degrees Celsius (83 degrees Fahrenheit), was too warm to sustain it for an entire lap--the engine would overheat.

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Sanna, 27, knows this track well.

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