I did this once-many years ago. The funny thing was that my roommate was a vet student and she had no idea how to help me. We disassembled the needle mechanism. Her brother took me to the health center. The nurse took one look and kinda had to laugh and said the needle has to be reversed and she took hold and pulled it back out. Boy, did that hurt. However, I had much to be thankful for. The needle missed my fingernail and the bone. But, I did need a tetnus shot. Thus far, I've never done that again-I remember the pain! Hope you heal soon.