Naked tai chi; the That Guy ensemble; "I taught him everything he knows"; the profane reporter brush-off; "How can the same shit happen to the same guy twice?"; airports at Christmas
The line about having taught the villain everything he knows is a favorite action trope, spun into a First Blood-style bit about a rogue colleague turned terrorist.
A reporter asking a colonel (transcribed "Colonel Stewart") for a few words and getting a two-word profane brush-off as he walks past her is chosen and jokingly recommended for office use.
The line about the same thing happening to the same guy twice is praised for self-awareness and noted as sampled in Positive K's I Got a Man.
Airports at Christmas are chosen for the chaotic, nostalgic vibe of parkas and drinking before flights, though the same behavior also counts as aged worst.
McClane leaving his car at the curb, drinking and spotting trouble across the terminal is contrasted with a real traveler watching a Bulls game with a bet on it.