I had a hammer with me, and got it to move around better with that. I'm not that experienced with a hammer, but I am experienced enough to know not to make things worse by just whaling away, so I didn't.
Then once the trigger wire broke ... I thought it best to leave for folks who really know the drill (no pun intended).
I'm pretty sure it needs to go downwards, to come out. Up is tempting, and it does move around a little better higher, but it likely went in from below and needs to come out that way.