"Transiting wormholes. Jump pilots need a lot of delicate neural circuitry whose installation is one of the highest-paid jobs in the wormhole nexus in order to interface with their ships to accomplish a jump, and on top of that they need to have the right kind of brain to begin with. I don't think you can make either of us into a jump pilot. We could hire one, if we had a jumpship, but that would involve more direct interaction with people than I'd like."