Alien (1979) Opening scene oddity

[Ahpook]

At around the 1:24 mark in this video you see something has hit the chair causing it to rock slightly. After that we see the pages of the book flutter and hear a slight thud afterword.

I guess it could have been Jonesy the cat! But, he should be in hyper sleep with the crew, correct? Wonder if it was ever discussed by Ridley Scott?

Something I've always wondered about

[Thomas Hurt]

1. I always just thought of this scene as the ship "waking up" powering up, air circulation, etc.

[grumpyduck]

2. Yeah, me too.

Although the chair could have just been bumped by a crew member. Happens now and then.

[Ahpook]

4. Yeah I thought of that as well

Although it's a fairly noticeable bump to leave in if the film crew did it.

[docgee]

3. Yes, air circulation.