Replying to My px-12's

Failed me. ): had them for 2 years and always loved the binding, but when I came out of a box, I got a good pop and was trying to do a frontside 450 out and I only made it 270 when I guess I panicked and landed then landed while my body was still trying to do the 450? (I landed 5 or so sucessfully before that). Long story short, my bindings didnt release and I twisted my knee really bad, I heard cracking I think? If that makes sense... Im currently sitting at the ER with a knee thats the size of a watermelon.