Add to ORKGExtra-planar (EP) gas in several spiral galaxies shows a decrease in rotational velocity with increasing height above the disk. The majority of this EP gas likely originates from disk-halo cycling driven by star formation in the disk via galactic fountains, which predict a lagging EP component. However, observations for a handful of galaxies show a steeper gradient than predicted by galactic fountains alone. A possible remedy for this is EP gas originating from infalling material, such as accreted satellites or the IGM. Accreted material with lower initial angular momentum than the disk could contribute to a steeper rotational velocity gradient. Studying the kinematics of EP gas can therefore provide constraints for how widespread accretion...