Question: Did John Belushi do all the dancing, especially the turnovers in church, by himself or was it a double?
Question: What happens to Raul's little sister that makes him so upset?
Answer: She gets molested by a drug addict.
Question: I think it is the scene near the end when they are singing "Make the world go away", they pan the audience and zoom in on Amy Irving. Is that Arlo Guthrie in front of her? Sure looks like him.
Answer: I think so.
Answer: It was a double, and the "making of" documentary on the DVD shows this.
David Mercier
To be fair, John did do a lot of flips and dancing as Jake; just not all of them in the movie.