I didn't think that 'Steptext' and 'Still Life at the Penguin Cafe' were choreographed by the same person, but I'm bemused by the funny arm gestures that seem to crop up in both. (Rapid, jerky movements of the forearm, alternately forming right-angles and parallels. Looks a bit like the dancers are challenging an invisible opponent to fisticuffs....)
What do these movements signify, and are they part of an established vocabulary that is used elsewhere?
A.