You are the second person tonight that has done this and reported it on here. I would not tell them that you "forced it in" or that could be considered misuse of the iPad!
If there is enough of the "metal part" sticking out of the opening, maybe you could remove the piece with a very small pair of plyers or tweezers - but - if you are not at all comfortable with doing that - then don't do it. Take it to an Apple Store and ask them to remove it for you.
If you do try to remove it - pull straight out from the opening - don't pull out on an angle.
If you took it to Apple, they would definitely repair or replace it, I'm just not sure which.