Making of the 'Alien' Chest Bursting Scene - Behind The Scenes of a Sci-Fi Classoc - YouTube
50 Trivia Facts About 'Alien' (1979) – Creepy Catalog
The chestburster scene in Alien (1979) only had a handful of takes because the animal organs used in the scene started cooking under the set lighting, creating a revolting stench on set :
Alien Explorations: Alien: The Chestburster scene: Little Rascal
John Hurt dead: The true story behind the iconic Alien chestburster scene | The Independent | The Independent
Alien' 40th Anniversary: Ridley Scott, Tom Skerritt Reminisce - Variety
Is it true that none of the cast knew what to expect in the famous “chestburster scene” in Alien? - Quora
Alien's Ridley Scott reveals how that chest burst scene almost went seriously wrong
Alien (1979) - Moment the alien bursts from Kane's chest - YouTube