Billy Crystal is thinking back on his formative years in Martin Scorsese's classroom ... "He was a graduate student at the time, just doing his first movie, called ‘Who's That Knocking at My Door.' And it was 1968, 1969, 1970," Crystal remarked on ...

Billy Crystal recalls ‘very scary’ Martin Scorsese experience as a student - ‘He’d go, ‘Why’d you shoot it that way? Use a wide shot,’ said Crystal

Who would've thought that Billy Crystal and Martin Scorsese shared history before becoming mainstream successes? The actor recounted the time when he was at New York University and the acclaimed director was a grad student and his professor.