Watch a bunch of John Wick movies all in a row, and you can get pretty paranoid.

You start to think everyone’s an assassin. The guy at the newsstand, the street musician, the subway rider, that nice neighbor in the elevator — ruthless contract killers, all.

So perhaps it shouldn’t be too surprising that in “From the World of John Wick: Ballerina,” the latest installment in the Wickian world, we reach the logical endpoint: a town where every single inhabitant’s a killer. Yes, it’s a picture-perfect, snowy winterscape in Austria, where everyone wears wool beanies and very nice sweaters. But they also wield a mean flamethrower, and schoolkids have mandatory shooting practice.

The early scenes in this wacky place high in the mountains are the best part of “Ballerina” — they actually contain

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