  Negative propagation is an uncommon response produced by the local sign
change in Poynting vector components. We present a general Poynting vector
expression for all invariant beams with cylindrical symmetry using scalar
potentials in order to evaluate the possibility of negative propagation. We
analyze the plausibility of negative propagation being independent of mode
mixing; we study Weber beams as a particular case. The study of this negative
effect allow us to advance in the field of micro manipulation and understanding
of optical forces. Applications of these beams are discussed.
