Man, watching the orbits of Earth and Mars, I got terribly frightened for anyone that finds themselves stranded between the planets. There is a nice little window where they're pretty close, and then the Earth just absolutely zooms away.
One mistake and you're out there forever.
Even if you make it to Mars, you still have to wait 18-26 months it seems for a chance to return. f***. The balls on the people that will make that trip. Hope I'm alive for that.