Analysis of two dust trajectories (left: a₀ = 0.1 μm, right: a₀ = 10 μm) entrained in the photoevaporative outflow from R ≃ 20 AU. Top panels: actual motion in the (R, z)-plane colored by St. Lower panels, from top to bottom: t_stop and ϱ_gas, St and ∂_t St, the horizontal speed v_R of gas and dust, the vertical speed v_z of gas and dust, a comparison of the direction of the motion v_z∕v_x for gas and dust, and ϑ and v_ϑ. See the text for an in-depth commentary.