Besides vomiting teachers, Vietnam vets who bicycle, Muslims and Occupy Wall Street, here's another thing that the NYPD is worrying about: Jewelry. More specifically, jewelry that may have handcuff keys hidden in them!

According to the Daily News, "Although the key hasn’t yet been used to escape police custody in the city, a police source said, the key has been popular in other states, especially Virginia. An internal NYPD memo issued March 29 warned officers to remove all jewelry from prisoners." Police spokesman Paul Browne said, "When we learn of something like this, we make it public among the ranks."

Besides the bracelet version, there are little ones that are hidden as zipper pulls or ones that can be attached to buttons.