During the Sardaukar scene on the planet Salusa Secundus, Piter and a Sardaukar (general?) are having a brief exchange while the throat singing ritual goes on. After the exchange, it looks like Piter rolls/flicks his eyes in the typical Mentat fashion. It happens very quickly, and I missed it the first couple watches. Is he calculating something here, or is it a just a sarcastic eye roll?

Edit: I tend to agree that Piter would have already calculated these and all other variables. To me, it doesn’t quite look like a full on ‘Mentat’ moment as previously seen in the film. Weather it was improvised, a reaction to a real world stimuli, or a calculative moment, it was brilliant to have either written it, performed it, and/or have left it in the final cut.