Part 3- How does this excerpt from my novel sound? I have to break it up in parts cause I can't fit it all on here. ConstructiveCritisimPlz.?

So dashing through the rows of beach chairs and umbrellas he made a run for it, dogging around slower runners as he fled. It was too late. Hearing the growing sound of crushing debris and fading screams, he knew that the wave was gaining on him. Then without thinking, he hurried behind the trunk a palm tree, crouching against it and covering his head, knowing he could no longer escape the surging mass of water. With a powerful blast, the wave yanked him away from the tree and plunged him through a sea of debris, knocking the air out of his lungs. He flailed and kicked around with his arms and legs as he fought to reach the surface, but it was no use. With his brain starved of oxygen, he began to pass out, everything slowly fading to black. He couldn't breathe. He couldn't move. He was going to die…