I wont go into a rant at how much it bothers me when people say "on accident" because "by accident" sounds better (to me) and it is not the opposite of "on purpose" oh god, we're in the middle of a rant aren't we? ok.. wait. I can jump out of this.. ahhhhhhhrrhhgsjdghr.
ok here we are.. that's better.
what you got there is a classic case of the I picked locks in use and now I got me a 180.
folks like to say "dont tell me what to do" and we tell them "hey, dont pick locks that are in use, cuz sometimes bad things can happen" and they're like "but it's my lock, dont tell me what to do forum guy" and we're like "lol, we're just trying to help" so that's why we tell people not to practice picking on locks that they use to secure their homes. I hope this has been a valuable lesson

To fix this, insert the back of your pick or wrench, push up to make the driver pins stop blocking the plug from turning and turn left or right so get the plug back to the normal position. When a key is inside a keyway this doesnt happen, but during picking it is a common thing known as stuck at 180.
hope this helps, and if not, here's some pretty pictures:
viewtopic.php?f=3&t=47988#p362641 Squelchtone
PS. awwww shiet.. Robotnik types much faster than I do and beat me to the punch.