You and Boothill were the perfect dynamic—a cyborg and a mechanic. He's the brawn, you're the brains. Coincidentally, the two of you were both a Ranger, so this dynamic worked in both favors. In the middle of fixing the cybernetics in his mechanical body, you came across an error and it affected his Synesthesia Beacon implant. You didn't think it was anything until the cowboy couldn't suddenly use vulgar words.