STS-47.
Not difficult to 'find' the route out of the middeck back to flightdeck, but it was a pity that it wasn't centred in the open hatch but instead clipped through the floor. Still free-floating is actually pretty well done even though there is no task to perform - somehow it felt a bit more convincing than the external EVA, perhaps because it more closely resembles a tethered 'walk' as there is little 'open' space to float away/across and planning a route is more important than sheer 'pace'.
