I actually had a friend that found an old pin had to be at least 2 years old with a bent tip. He needed to take a site injection, so he bent it strait pulled the plunger a couple times, proceeded to fill it with prop. and got me to put it in his bicep. It was so dull that I had to push full force just to penitrate the skin. Needless to say he got a local site infection had to go to the hospital and they pumped him with anti-biotics. SO FUCK THAT, HE LEARNED MY LESSON FOR ME!!!!!!!!!!