Holm's quotes are from his autobiography.
Wasn't aware he'd written one. Recommended?
If you're there for Alien
... not really. He dedicates a chapter to it, but mostly focuses on his personal life. He mentions some difficulty playing Ash. Has a funny story about John Hurt and people on the cast and crew pressing him to explain how he would act out the chestburster scene. Hurt said he'd use his "not inconsiderable imagination and just... do it
!" Which shocked some people, because he bellowed the last part out, but Holm found it amusing. Holm was going through a lot of family issues at the time of filming so he kept himself to himself, mostly.