A 55-year-old man fell onto the subway tracks at Delancey Street yesterday just as the F train was pulling into the station – and survived by lying down in the disgusting shallow trough between the rails. The unidentified man became suddenly ill and fell onto the tracks at 1:34 p.m, but this time there was no hero to jump in and pull him out. The motorman on the incoming train hit the emergency brakes when......