new video in a boston train stati station, i man walks off the tracks and doesn't move. trace? >> reporter: we are told there is no mediate an rail himself. as he watch him fall here. this is a newly minted doctor. he lost his balance and fell. some passers by were stunned and finally others down in the pit and pulled him out to safety. the 33-year-old man told him that he had two drinks celebrate passing those exams and doesn't remember anything else. he says he doesn't remember falling in the pit and laid there and doesn't remember being