Bobby pink stuck in lock key hole!! PLESE HELP?

In school, we use locks to lock our lockers and I left my locker key at home. I got a bobby pin (not wise...) and i stuck it up the keyhole randomly. I just stuffed it up in there and it didnt unlock the locker and when I tried to pull it out, it was stuck!!! So then I tried harder and harder and the bobby pin broke. Half of it is jammed inside the lock and half was with me. You cant grasp the part which is inside it and so im really stuck?! Can I get it out somehow without an expert???