The technology that Dr. Ra-Havreii built for Melora Pazlar on Titan that allowed her to go pretty much anywhere on the ship in avatar form without subjecting herself to the rigors of full gravity. Later dialogue mentioned that he could offset the settings so that anyone attempting to grapple with her holographic avatar could not do her damage through feedback, and she could actually do more damage to them than a normal-strength human.
Think of what that could do for a starship security force. They could take on Hirogen borders with superhuman avatars, risk-free.
Assuming someone took out the Hirogen dampening field thingys first.