The end of the first episode. Tommy walks into a meeting between the local heads of the Irish and Italian mobs, pulls a knife from his shirt collar, kills the guard, takes his gun and kills heads before anyone can react. And then just walks out, leaving the bodies where they lay.
Jenny gets one in "Each One A Savior" when Jimmy cold-cocks her father as he tries to extort money from him, and she chases him down the street, tackles him and delivers a No-Holds-Barred Beatdown until Whitey pulls her off.
In the seventh episode, what does Tommy do to the old lady who tricked him into beating down a couple of thugs by telling him they sell drugs, when in fact she's the local drug dealer? He steals her door.