The spell Reverse Gravity includes this section (emphasis mine):
Once an object or creature reaches the top of the area, it floats, caught between the normal and reversed gravity. The creature can move along the plane where the two forms of gravity meet. Creatures that can levitate or fly can use those abilities to mitigate the effects of reverse gravity.
What does the bolded sentence mean? It sounds like you can 'walk' on the top of the effect, but that doesn't make a lot of sense to me (lacking traction) so I was wondering if that's the case (because magic) or if there is another interpretation that is more accurate.