Just joking, of course! As far as I know, Martha Argerich never did this kind of exercise to develop her technique. This is actually an excerpt from a piece named "The Target", by Russian composer Leonid Desyatnikov. The 2nd movement of this composition, "At the races", incorporates a Hanon exercise in a very original and funny way.
Listen to the whole Desyatnikov work here: • Desyatnikov, The Target - Martha Argerich ...
Video downloaded from Gidon Kremer's official YouTube channel: • Leonid Desyatnikov: Target - At the Races ...
#MarthaArgerich