In the ending of the movie (one of my favourites, incidentally), Jack Nicholson provides an absolute master class in how to act like a deranged psychopath, and it was my go-to choice for this task. Struggled (as I usually do) to provide an actual likeness to a real person (in this case, Nicholson) but overall happy with the result.
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All produced on iPad as usual using sketchbook pro. Spent about half an hour doing the sketch then about another hour and a half trying numerous attempts at a background that wouldn't detract from the sketch, but that conveyed the iconic snowy darkness of that end scene.