Curious about what you use and how you came up with it???
Never forget that the universal safeword is “what the fuck, asshole!”
Seriously. If you want out of a scene and your partner doesn’t seem to be registering your distress, then even if you haven’t set a “proper” safe word, if you’re snapped out of your zone it’s 100% acceptable for you to snap them out of theirs.
Also note: in most circumstances a top is doing something wrong if they push their partner to a point they need to safeword. It’s not a good thing. It’s not a “win.”