(I don't know if there is a better place to put this, so I put it here. ) I noticed that when Kerbals enter a command capsule, their RCS fuel is refilled. Using this idea, I wondered, is it possible for a Kerbal to "Get out and push"? Now, rather than just asking the question, I went and tried it out. I put a command pod on a highly elliptic orbit with periapsis just outside of atmosphere, waited to apoapsis, then had my brave Kerbalnaut get out and rcs against the pod for a few seconds. I only managed to change the velocity by a few m/s, but I got some "free" delta V and managed to save a Kerbal that would have otherwise been doomed. Now, I don't think this is a game changer in any way. To go anywhere meaningful you would need enormous amounts of time babysitting the command pod, but I do think it's amusing, and a testament to the physics engine, even in its alpha state. Also, it means that stranded Kerbals in a pod in deep space aren't as doomed as they may have thought--they can always just push their pods to the nearest planet, and hope that the devs don't add a limit to the amount of EVA RCS fuel a pod carries.