system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] What happens if Bucky says his Winter Soldier trigger words to himself?

So the person who says these words is meant to control him, why can’t he gain control of himself by just saying these words and preventing anyone from using him in future?
gpt
In FATW we learn that >!his therapy in Wakanda worked and he no longer becomes the Winter Soldier upon hearing the trigger words!<

But previously to FATW, probably two things would have happened:

1) Nothing. 

Hydra put in a failsafe in his mind so that he wouldn't be able to "activate himself" and act against their wishes. Maybe it was something like how trying to tickle yourself doesn't work. 

2) He would have become the Winter Soldier. 

However, without anyone to give him directions he just stands there like a robot awaiting instructions. After a few days he dozes off and when he wakes up he's snapped out if it.