  We use pseudo-Anosov homeomorphisms of surfaces in order to prove that the
first order theory of non abelian free groups, $T_{fg}$, is $n$-ample for any
$n\in\omega$. This result adds to the work of Pillay, that proved that $T_{fg}$
is non CM -trivial. The sequence witnessing ampleness is a sequence of
primitive elements in $F_{\omega}$.
  Our result provides an alternative proof to the main result of a preprint by
Ould Houcine-Tent.
  We also add an appendix in which we make a few remarks on Sela's paper on
imaginaries in torsion free hyperbolic groups. In particular we give
alternative transparent proofs concerning the non-elimination of certain
imaginaries.
