At a Union Square Park vigil that drew about two dozen Tuesday evening, buddies recalled warning Zackery Nazario, 15, to be careful as he pulled his dangerous stunts.
Cops on patrol at the Queensboro Plaza station in Long Island City spotted the teen clinging to the back of the last car of a departing No. 7 train on its way to Flushing about 10:15 p.m. Wednesday, an NYPD spokesman said.