Liza Dye is a living advertisement for why you shouldn’t walk while engrossed in something on your cell phone, especially before getting on the subway: The 25-year-old New York resident recently learned the hard way that technology can be hazardous to your health. Dye fell onto the tracks in front of an oncoming subway train at New York’s Broadway-Lafayette Station, while engrossed with her phone on Thursday. The oncoming B train stopped short, but not before rolling right over the South Carolina native, who is lucky to be alive. …