Scientific Error Spreading:

A McDonald's wrapper informs us, "In space, you can jump six times higher." Only in those parts of space (which are often not even thought of as quite "in space," though I suppose under some definitions they qualify) where the gravitational field is quite right.

Thanks to this site for confirming the text (I failed to save the wrapper, so I'm working from a two-day-old memory), and for getting there first.