Dr. John Clarke is back to his old tricks, this time shining the spotlight on the LIRR's ongoing campaign to "Watch the Gap" when exiting trains. 

Clarke, the LIRR's medical director, delivered a rap -- much like he did for the swine flu prevention campaign last fall -- Thursday at the Mineola train station.

>> Read Tula Batanchiev's full story and watch the video below:

Residents sue over industrial park plan ... Teen pleads guilty to fatal stabbing at house party ... Jets-Pats preview Credit: Newsday

Tax hike in town's proposed budget ... Residents sue over industrial park plan ... Attacks ads targeting Suozzi paused ... Out East: McCall Wines

Residents sue over industrial park plan ... Teen pleads guilty to fatal stabbing at house party ... Jets-Pats preview Credit: Newsday

Tax hike in town's proposed budget ... Residents sue over industrial park plan ... Attacks ads targeting Suozzi paused ... Out East: McCall Wines

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