  It is investigated the statistical properties of random walks evolving on
real configurations of a crumpled wire rigidly jammed in two dimensions. These
crumpled hierarchical structures with complex topology are obtained from a
metallic wire injected at a constant rate into a transparent planar cell of
20cm of diameter. The observed diffusion is anomalous with an exponent very
close to that obtained at the threshold of two dimensional percolation. A
comparison of the system studied in this paper with other systems of physical
interest is also made, and an experimental consequence of our results is
discussed.
