Hey Andy,
Long time no chat.

I've been so busy lately, that I just haven't had the time to post as I used to, but I've enjoyed seeing how actively you've been involved. You are a wonderful addition to this sangha.
Anyway, ive got a few moments, and i thought i would respond to your question...
Green Tara didn't get much feedback on whether others had pushed through physical pain and anger at noises like this, I'm interested to know the answers, as there is a fear on the pain side, that I'm doing damage somehow.
I've had many similar experiences to Green Tara on retreat (and milder ones in daily practice). And I know that I have been greatly helped by these experiences. I've seen intense pain dissolve in the actual moment (as GT describes), and I've had areas of my body that seem chronically afflicted with intense pain (for hours or days), only to have it all vanish after a brief break between sittings.
For me, the real benefit of having these experiences is that I started to see the deep interconnection between "pain" and "my mind's reaction to pain." After enough experiences seeing pain dissolve, I learned to have a much deeper faith in the power of my own awareness.
I realized for myself that if my awareness is sufficiently calm and kind, then the pain won't be very troublesome... and may even just dissolve when deeply observed. On the flip side, if my awareness is aversive in any way, painful sensations will be amplified.
So, it's really important to know the quality of your awareness, and to train it to be calm. That is always my top priority. Trying to simply endure pain without that knowledge and training is unfruitful and dangerous.
You can definitely injure yourself physically, and may even end up planting seeds of deep aversion. After all, if you sit around stewing in anger and frustration, that is the kamma that you are planting for your future!
It helps me to think of the practice as a "stretching" exercise. I am stretching my capacity to have a calm and kind awareness. First, i have to cultivate a base-line of calm... Which is generally much easier to do without trying to endure pain. Then I can stretch that calm. Sometimes, I stretch it by training myself to be aware of pleasant (or at least neutral) sensations even while painful sensations are present in my body. Other times, I stretch by calmly observing the pain itself.
The trick is to know how far to stretch. Stretch too far and you are just agitated, and not cultivating any good qualities. Even worse, you injure yourself. But if you don't stretch at all, you never really develop in equanimity, which is a wonderful gift of the practice. The first step to this sort of training is to know yourself well enough to answer these questions: How far should you stretch? When are you over stretching?
In my own practice, it has really helped to become more skilled at tuning-in to awareness itself, and seeing the different ways (obvious and subtle) that the body and mind influence each other. That's something we all have to see for ourselves. Ive also benefited a lot from deepening and my clarifying my intention for meditation: to broaden my capacity to be calm and kind. That provides me with a valuable compass to make skillful choices at different moments in meditation (whether to move, whether to observe or ignore pain, etc.)
Anyway, it truly helps me to reflect on these things in writing. I hope some of this benefits you and others.

With metta,
KN