She let go of the Humvee.  It roared forward on a burst of speed.  With a running leap, she sprang onto it’s back, charging up and over the roof.  Gunfire exploded around her, the bullets striking her body in a painful hail.  She ignored them and launched herself off the Humvee’s hood, directly into its path.
She rolled into a somersault, came up standing, and barely had time to plant her feet and turn, hands held out before her.  The Humvee barreled into her, driving her backward, sandals sliding over pavement.  The force of the impact quaked up her palms, and she gritted her teeth, bracing her shoulders, as the Humvee’s engine roared.