Scorsese's longtime editor, Thelma Schoonmaker, began working with him on his first film in 1967. She's responsible for the infamous cocaine sequence in the second half of the movie, where Henry Hill spends a hectic day, snorting cocaine, trying to sell guns, and worrying about the helicopters in the sky.
“We wanted it to be jagged and raw and driving, frenetic,” said Schoonmaker in an interview. “We kept saying we could make it faster, we could make it faster, faster, faster. And I think, in a way, it sort of started this whole jump cut idea of cutting now that’s taken over a little bit too much.”
While Schoonmaker was nominated for a Best Editing Oscar for Goodfellas, she did not take the Academy Award home, although she has won for three Scorsese films: Raging Bull (1980), The Aviator (2004), and The Departed (2006)