A 23-year-old man fell to his death Saturday while jumping between rooftops in North Philadelphia, according to police. The incident occurred just before 2 a.m. on the 1200 block of Buttonwood Street. Police identified the man as third-year Drexel College of Medicine student Vivek Subramani. Witnesses told police that they were jumping between the rooftops of their apartment building when Subramani did not make the jump, falling two stories down and hitting his head. Witnesses also explained they had been drinking earlier in the evening