  We discuss whether position measurements in quantum mechanics can be
contradictory with Bohmian trajectories, leading to what has been called
\textquotedblleft surrealistic trajectories\textquotedblright\ in the
literature. Previous work has considered that a single Bohmian position can be
ascribed to the pointer. Nevertheless, a correct treatment of a macroscopic
pointer requires that many particle positions should be included in the
dynamics of the system, and that statistical averages should be made over their
random initial values. Using numerical as well as analytical calculations, we
show that these surrealistic trajectories exist only if the pointer contains a
small number of particles; they completely disappear with macroscopic pointers.
  With microscopic pointers, non-local effects of quantum entanglement can
indeed take place and introduce unexpected trajectories, as in Bell
experiments; moreover, the initial values of the Bohmian positions associated
with the measurement apparatus may influence the trajectory of the test
particle, and determine the result of measurement. Nevertheless, a detailed
observation of the trajectories of the particles of the pointer can still
reveal the nature of the trajectory of the test particle; nothing looks
surrealistic if all trajectories are properly interpreted.
