Luca Badoer splashing around Spa-Francorchamps during practice in his less than successful stint at Ferrari in 2009.
Many derided Luca for his performance, but after never having driven the 2009 Ferrari, at 38 years old (ancient for a modern F1 driver) and not even having raced at all for 10 years, I think he did as well as anyone in that position could do.