Behold, my powers of description!
Of all the different aspects of writing a story (character, story, plotting, theme, pace, suspense, what-have-you) by far the easiest to get on the page is description. You may not know who Jack is, what he’s going to do or how he’s going to do it, but you can still get 400 words down about the boots he wears and the view from his window.
Describing stuff is a necessary part of any story, but it can also go on for quite a while. Certain genres suit a more flowery style (romance, fantasy, historical fiction) and literary fiction in general can tend towards a more deliberative use of language. But it’s not enough to describe something well, you also have to know why you’re describing it.