Is this a picture of Rafael Nadal celebrating or … ?

Rafael Nadal is, how you say, demonstrative on the court. In defeating Tomas Berdych 6-7, 7-6, 6-4, 6-3 in the quarterfinals of the Australian Open, the Spaniard was particularly so, seemingly celebrating every point in the final two sets with a different type of celebration. Or maybe they weren't celebrations at all. Perhaps Nadal's on-court gestures and gesticulations mean something else entirely. Busted Racquet tries to get to the bottom of it in the post "is this a picture of Rafael Nadal celebrating or ... ?"