Continuity mistake: When Mac first shoots up the jungle, he runs out of ammo. From the behind shot the barrel of the mini gun isn't spinning. Then, from the front shot when Mac releases it the barrel is spinning. (01:46:25 - 02:46:30)
Continuity mistake: When Mac calls to Dillon about the scorpion you can see that there wasn't one on his back to begin with.
Continuity mistake: The bullet riddled tree that Poncho is hiding behind changes. It goes from severely riddled to not as much damage.
Audio problem: While a cool sound for the movie, the electric motor powering the M134 mini-gun vastly overpowers the sound of the actual gunshots from it, essentially making it sound like a turbine engine instead of machine gun. Plenty of videos available show this is impossible.
Answer: He wanted Dutch and his team to help him retrieve the intelligence documents he was rooting through. The Soviet officer shot by Dutch ("Knock knock!") was also looking at the same documents and was planning on moving them out of the country. The story goes a CIA operative was carrying intelligence and was shot down over Val Verde by the guerrillas who are aided by the Soviets. Dillon sent Jim Hopper and his Green Beret unit there to rescue his men and retrieve the intelligence but they were ambushed and killed by the Predator. Believing Hopper and his men were killed by the guerrillas, Dillon felt he had no option left but to hire the best rescue team he knew to complete the mission. Dillon knew Dutch didn't do this sort of black ops work so he lied to him and made up the story about rescuing a cabinet minister.
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