The movie 'First Man' opens with Neil Armstrong's test flight of an X-15 which almost ends in disaster after he flies way past his landing area and over the edges of LA. While the movie chooses to portray this as a consequence of his distracted state of mind over the health of his daughter, there's a series of technical decisions that lead to this. If you want to go deeper into the stories behind the movie I recommend the book from which is was adapted: First Man: The Life of Neil A. Armstrong by James R. Hansen https://amzn.to/2RpArY7