  While a single Carroll particle can not move, a multiparticle system with
momentum-dependent interaction \underline{can}: the center-of-mass is fixed
however relative motion is possible, confirming a previous statement made by
Bergshoeff et al \cite{Bergshoeff14}. Analogous results are obtained for
electric dipoles with the roles of the center-of-mass and the relative position
interchanged. Immobility can also be deduced from the Carroll boost symmetry.
