So I after 2+ years of knee pain, I was finally diagnosed with osteoarthritis. That is a whole other thing. I do still find relief from the mobility exercises, particularly the couch stretch and smashing. Obviously, the smashing can be painful, but I will get to a certain extremely tight (bowstring like) area near the knee/patella pouch that gets a shooting pain that seems to wrap around the inside of my knee all the way down my leg. Its very quick because I can’t help but react and remove the weight/smashing. Are there any nerves in that part of the leg as it almost feels like that or like an electric jolt.
The general rule here is “if it feels sketchy, it’s probably sketchy”. Don’t ignore any pain that you interpret as nerve-like. Working upstream and downstream of the problem area can help, or just change the angle/pressure so that it doesn’t feel sketchy. But don’t go into the pain cave and hurt yourself.