Phobosphobia?

Not for these guys. They are having a blast in the low gravity of Phobos. Bonestell started the tradition here of starring astronauts as acrobats on this moon, a tradition that Miller and others continue.

According to Miller, "In the low gravity of Phobos, a jump that would lift you six inches on Earth would take you some 800 feet up Phobos!" Explorers could bounce along and around it, peering into craters and grooves, "leaping tall boulders in a single bound." The experience, Miller says, would give people a curious intimacy with Newton's law of gravity.

Coming to the Mars system actually means exploring many types of Solar System objects.