"Revenge is a dish best served cold." Contemporary humans have come to accept that statement, famously first uttered by somebody at some point in the past, as indisputable wisdom. (There's some disagreement on who said it first, which is why the past was dumb and living in the future rules, because now we have comment sections where people can note that they were first so that everyone knows. Sit on it, The Iron Age.)
As such, contemporary humans have no choice but to view Glen Davis'(notes) refusal Thursday night to acknowledge and reciprocate the high-five request of Kevin Garnett(notes) on the way into the locker room at halftime of the Boston Celtics' preseason matchup against the New Jersey Nets as the greatest vengeance in recent memory.