Since the other solutions didn't work for me at all, I'll make an alternative solution for people to try. Worked for me first time with no issues. Start the stage "Outta My Way", this is the second half of the first world unlocked after freeing all the Nymphs.
Proceed through the stage until you encounter the hunter who shoots homing missiles. He is just after a stretch of water, go under the water and swim through the hidden tunnel. Climb up behind the hunter, he will still try to shoot you but won't turn around, the missiles will loop around and come at you just jump/move out of the way so it hits straight into him.