The final Hurk mission unlocks after the campaign mission “A Bridge to the North” and requires the Vehicle Takedown skill to complete. The mission title is actually an in-joke. While seeking out the last monkey statue, Hurk got himself stuck in the back of a moving cargo truck that will explode if it drops below a certain . . . speed. So now, he needs you to be his “Keanu.”
Make your way to the buzzer and dispatch any guards around, then track down the truck.
You’ll need to swoop alongside the truck and execute a buzzer-to-truck vehicle takedown, which is just as cool as it sounds.
From there, it’s another sort of gauntlet run over twisting mountain roads strewn with rolling barrels, roadblocks, and other obstacles. There’s not much strategy here. Just keep it on the road (away from trees) and plow through anything that gets in your way.
Though it would be humane to slow down just enough to let the yaks get out of the way.
Eventually, Hurk will find the statue and tell you to bail out just before you slam the truck into a Royal Guard outpost. Where it does what trucks that explode when they stop do when they slam into a Royal Guard outpost.
And Hurk finally has the full set of monkey statues. And you have the Impaler harpoon gun. At least, you will when you visit the trading post and check out the Signature Weapons section.