I'm sure a few of you have already figured this out, but since I'm a little slower I just discovered this today and wanted to make sure others know.
I've only had three Pod go into scream mode over the past year. The first two times I had considerable difficult silencing it (pens are too big to fit in the little hole, pencils not strong enough,...). Anyways today I pulled the lancet from my lancet device and it worked with great efficiently. The sharp lancet quickly gets past the rubber gasket and breaks the part inside to quickly silence it. Of course I needed a new lancet to put back in my device, but I should change that more often anyways.
Now I'm much less worried about it going into scream mode since I know I can silence it within a few seconds even if the PDM can deactivate it.
Hope this help!