Neither is Bones, but this is usually how things turn out for him, so he's ultimately not that surprised. Jim's the one who convinced him to go on this trip anyway, so Bones can conveniently blame the captain.

"Yeah. I work in space, actually. Have you heard of Starfleet?"

It's kind of amazing to him how many people here haven't, though if what they're all saying is true, they're from different times and places anyway - where Starfleet wouldn't exist.