i can't really say when, i had a friend and a brother in my car and we were late to the movies. lol. there was a crazy hill pulling into the parking lot that i took at a big angle. but i noticed the "clunk" earlier that day, but it was horrible after leaving the movie theater.
i still think it's from the excessive angle of the sway bar. and going over potholes, speedbumps or driveways at an angle where it loads only one rear wheel at a time might be what broke it since the bar cant rotate anymore.
right now, isince my car isn't really that low i've just decided to bear with scraping and going over everything as straight as i can to keep both rear wheels even.
i still have to contact BC about this. hopefully they will send me just the lower bracket wthout me sending the old one first because i can't have any downtime with my car.