Notice how the tension in the first few lines escalates and time seems to slow down. This reflects the moment of adrenaline the protagonist—our point of view—is feeling.
First, we are told there are troopers. And they’re armed! And they’re recovering fast! And they’re raising their weapons! Aiming!
Stretching what is probably a second of real-time action over multiple lines makes us hold our breath, waiting to see what will happen next—
—so when the thing that happens next is not expected, it has greater impact. This reversal from a dire situation to the hero’s favour makes the action much more exciting.