Well, I don't know about stabbing, that isn't what entered my mind, but I have had very painful ones, even went to the emergency room thinking I was having a heart attack.
I get it bad in my arms like someone suddenly filled them with cement and the pain is horrible. I have felt like I was being beaten up badly.

I don't decide to experience these painful attacks, I just have them, especially if I am badly triggered. I try to manage them and used to take Klonopin they were so bad, even woke me up at night. I have tried to manage them and not take the Klonopin, but sometimes when I have too many or a really bad day, I just need a break from the pain and will take a Klonopin.

You should talk to your therapist about them if you keep experiencing them, even talk to your GP. Mine were so bad I ended up having my GP hook up an ekg for a while to make sure my heart was ok.