My understanding is that while some people have the build to just counter-pressure between their shoulders in the chimney and their feet on the foot-rail, some (Shanti included) are too short for that to be effective.
Naw, shes's just walking the cam up, walking the walk. Although I'd love to see the movie, especially the part about how she reverts to vertical from this position.
Pamela is one of the best offwidth climbers out there and a master at inverts. She is a true inspiration to us chicks who love it wide. Lucille is such a badass climb and one I can only dream about climbing.