  We present here a statistical study of the transit time required for a
magnetic domain wall to go through a small laser spot focused on 2D magnetic
thin film. The domain wall velocity deduced this way is in good agreement with
the other ways used to measure this parameter. But, the main fact is that the
transit time is not a reproducible parameter, we have observed a quite large
distribution of this parameter. This distribution can be explained assuming the
movement to occur through jumps, whose probabilities are given by a Poisson's
process. The fitting of this distribution has enabled us to get the required
number of jumps to reverse the magnetization of the small area under the laser
spot. This important parameter should lead to a better understanding of the
creep regime.
