Some writers are interested in emulating the style of writing action in feature scripts that was popularized by Walter Hill (for example, in his rewrite of the original "Alien" script).
Here's the best way for doing the Walter Hill "writing down the page" style of action: use SHIFT-ENTER to put in a hard line break at the end of a line of action where you wish to simply drop down one line. It looks great, and doesn't mess with any of Screenwriter's page break mechanics.
If we may be so presumptuous, we have seen almost every style of script since we invented screenplay word processing in the early 1980's. We almost never see the Walter Hill style -- except for Walter Hill and Tarantino, and maybe a few other screenwriters. That's because it's become so heavily associate with Walter Hill and those select few successful screenwriters. When done with great expertise, it can be a joy to read -- anything less calls a lot of attention to the style.
However -- an expert studio script reader (and former head of the Script Reader's Union) says:
"It does facilitate a sense of edited visuals in the mind's eye. It's also easy to read as the eye can scan the page more quickly. However, the writer has to make sure it doesn't get monotonous and that it's evocative with fewer words."
We've also seen writers jump in to the "writing down the page" style just for action sequences. Another approach is to use a similar format of short sentences of action, but still maintain the extra blank line above and below each line. But that, of course, takes up a LOT more space in an action-heavy script. (although, those same shots lines placed into a normal paragraph of action take up LESS space!)