According to one fan theory, Predator’s titular villain let Arnold Schwarzenegger’s Dutch escape on purpose since the character beat the monster fair and square. The idea that the Predator tried to kill Dutch with an explosive blast at the end of 1987's original Predator has never added up. According to the mythos of the Predator franchise, Predators believe in honor and civility (despite the high body count they rack up across the series).
What makes the Predator so different from the Alien franchise’s lethal Xenomorph is this fact. Predators hunt for sport rather than sustenance. Where the monsters of the Alien series are mindless killing machines that can’t be reasoned with, the Predator is threatening precisely because the monster is at least as intelligent as a human. This is the thinking behind a fan theory that suggests an alternative motivation for the Predator’s self-destruction at the end of 1987’s original movie.
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When Dutch holds a huge rock over the injured monster before deciding to show mercy and not kill the Predator, conventional wisdom states that what happens next is the Predator proving a warrior should never turn their back on an injured enemy. The Predator plays back Billy’s laugh, seemingly taunting Arnold Schwarzenegger’s hero, before then blowing itself up with an explosive charge. The assumption is that the monster was a sore loser who hoped to take out Dutch as it died, but one fan theory found on Reddit refutes this reading. Since the Predators are established as creatures obsessed with honor, this theory reasons, the monster could be looking to give itself the merciful death that Dutch denied it.
The theory argues that
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