'Tuff Turf' (1985)

Downey, right, plays Jimmy, a friend of James Spader's Morgan, in this story of a teen who finds trouble in pursuit of a girl. While making the movie, he ran into Anthony Michael Hall at the studio -- and "that led to 'Saturday Night Live' with him vouching for me, and it led to 'Johnny Be Good.' It was big for me," Downey said.