> Scenes had to be added to pad out the runtime to the requisite length. These additional scenes include a lengthy sequence in which Pinback does battle with an alien in the form of a beach ball with clawed feet.

https://www.youtube.com/watch?v=vywgEsuyGEY

I have a hazy memory of a scene where the beach ball alien is punctured and is propelled about the room like a deflating balloon.

> its most famous scene consists of an existential debate between an astronaut and a sentient bomb

https://www.youtube.com/watch?v=h73PsFKtIck

(if you are concerned about spoiling the ending of the movie, you may prefer to watch the entire film from the start rather than clicking the above link)