I have to come clean: the shot is a single exposure on my new, impressive Leica SS (available to special order in chrome or black, with personalised livery if desired), which has a rolling shutter that you can set to automatic follow-focus and which also, automatically, pauses the exposure until the subject has assumed the second position, at which stage, whether or not the lighting has changed, the exposure is compensated via an intelligent algorithm and perfect tonality achieved.
I think it's part of the improvements in programming since doing the Huawei accommodation.
You don't even require Photoshop. Think of the all-round savings!
Rob