In 1908, Houdini stood at the edge of the Harvard Bridge—commonly referred to as the Mass. Ave. Bridge—and was shackled by a Boston patrolman. His hands were handcuffed behind his back and chained to a collar around his neck. According to a Boston Globe article chronicling the feat, a signal was tooted from a towboat, and Houdini went overboard into the chilly waters below. “There is always the possibility that I will be unable to free myself, as one never can tell what will happen to a lock,” Houdini told the newspaper. “However, I am a good swimmer, have confidence in myself, and I hope to perform this feat successfully.” The Globe estimated some 20,000 spectators gathered to see Houdini’s leap, including the mayors of Boston and Cambridge. They waited 40 seconds for the magician to resurface, which he did with the shackles in his hands.