Every NBA coach knows that in the playoffs, you always pare down your rotation to your 8 best guys, max. Because every game is critical, the playoffs are not the time to develop that promising rookie you took in the second round.
However, every NBA playoff roster also has 12 players. Any first grader could tell you that means you have 4 players who are never going to play under any circumstances.
Now then, suppose there's just a minute left in the game and you're losing without much of a chance for a comeback. What's a coach to do? Obviously, if it's close enough that the other team still has its starters out, you bring in those 4 losers and have them physically attack the other team's stars so they're out for the next game. The NBA, in its infinite wisdom, will suspend everyone involved in the incident, which means your opponent will be without all of their best players, while you just have to suffer the loss of Sucko McBenchwarmer. As a bonus, the other team's subs, seeing that their friends and teammates are getting attacked, might come on the court to try to put a stop to it. Bam! Any player that leaves the bench during an altercation is automatically suspended one game, so you could conceivably take out their star and all of their subs. Suppose nothing bad happens at all. Well, then you got a free chance to injure the other team with no risk whatsoever. And if anyone says bad things about you or about how the whole thing reeks of bad sportsmanship, you can just say something along the lines of "It was just an end-of-game foul and Steve fell down. I didn't think it was such a big deal." Forget that the video clearly shows your player hip checking the other team's star, who was laid out flat with his head smashing against the scorer's table. I'm sure no one will notice.
This message has been brought to you by Robert Horry and the San Antonio Spurs. Stay classy, San Antonio.