  Using available kinematical data for a subsample of NLTT stars from the
HIPPARCOS mission we confirm the existence of a previously reported local
anomaly in the (u,v) plane: the mean motion u for old disc stars, with v < -30
km/s, is largely positive (+19 +/- 9 km/s w.r.t. the Galactic Center).
  With the use of the newest global self-consistent numerical models of our
Galaxy, we show that a bar could be responsible for this observed velocity
anomaly. A fraction of our stars have bar perturbed ``hot'' orbits, allowing
them to erratically wander from inside the bar to regions outside the
corotation, in particular through the solar neighbourhood.
