John breaks Ernest's jaw before finishing him off by using the book as a chopping block for a Neck Snap.
John's stabbing Huang's henchman with a knife slowly stabbing his eyeball. Then he casually finishes off Huang with an axe to the head even though Huang couldn't even stand anymore. Wick did warn Winston that if anyone comes after him he'll kill them.
The ballerina dancing in front of the Director until she drops, first thing off is the shot from her back where her legs are seriously bruised, then later she rips off a toenail without reacting.
Blink-and-You-Miss-It but almost all the ballet dancers have back tattoos that peek out from the backs of their leotards that are very similar to the one John has, implying it is some type of way to identify members of the Ruska Roma. Some of them are barely teenagers and the implication that they are all being raised as Child Soldiers is quite horrifying when in the Director's own words they are all orphans seeking a better life without suffering.
Zero storming the Director's headquarters with quick and brutal efficiency, and then impales the Director's palm without saying a word.
The assassins' world in Wick is pretty frightening, almost everyone in New York either knows about them or doesn't even see the bodies dropping, immigrant children are trained into becoming killing machines for the High Table and the organisation's history and presence is implied to go back to the Middle Ages. Before this movie, a popular fan theory was that Winston was among the founders of the system, because of how old he was and how much power he had, but it turns out he is just a serf who served for forty years and is still expendable in the eyes of the true power.
