It's important to write building scenes as we work to heighten the tension, drama, and plot of a story. When we get to those critical moments, the writing must be different. One way to change the tone and heighten the intensity is to slow the pacing. Concentrate on each beat, breath, thought. Think of the movies and how you can hear a character's heartbeat and breathing while everything is moving in slow motion. We can do this with our words.
The gun exploded. Jake's shoulder burned in pain as the shot lifted him off his feet and on his backside upon the compact dirt. Warm liquid soaked his shirt as he realized no one would find him in the darkened alley--not until it was too late.