I am going to try this tonight.
I read an article that says you can build tension by making longer sentences and paragraphs(readers tend to breath where the punctuation is).
So, once you hit the mark where action begins transition to short sentences (the reader will go from holding their breath,waiting for you to tell them to breath, to breathing quickly). I do the latter a lot but I have not put them together for this effect.
Let's see?
If any one try's this before I do in the comments tell me the story you used it for.