At the cross, we see how Mary Magdalene supported Christ. With this work we find a link in the history in both painting and sculpting. Inspiration came especially from the sculpture of Michelangelo Buonarroti or Piero Della Francesca. At the painting certainly Jacopo da Pontormo was a great inspiration.
Here is a two-dimensional representation of the three-dimensional attached where fantasy transcends into realism. For example, at the supporting hand is even a sixth finger added. The much discussed third leg at the Peasant Wedding from Pieter Brueghel the Elder tells us something about movement, but maybe it was just such a compositional element, where there was a need to move away from reality and to proceed into fantasy.