Hiya. I've been writing a teen mystery type story and was wondering if anyone could tell me what they thought from a little extract from the middle. Thanks in advance for any thoughts! I'm not a professional by any means as a little disclaimer! 
There were a handful of things that would always remind her of that awful, awful night. Rain - the shock of the icy cold droplets hitting her bare back. The screaming - would she ever again close her eyes and not hear the screaming? And who could forget the vodka Savannah had plied her with earlier in the day? The dutch courage that burned the back of her throat and gave her the idea that she and everyone else was invincible. Not Julia, that’s for sure.
The ledge was slippery. It had been just one little shove, she wasn’t meant to fall over. Julia would have never done that on purpose, she could never hurt someone like that. No, not the girl who cried the first time she hit a possum with her car. She only pushed her to save Savannah. She hadn’t really meant to hurt her….had she?
But, intentional or not, she had hurt her. Badly. In a way that she might never recover from. Vomit rose in her throat as she had watched her fall.
She leaned over the edge of the roof, her heart in her mouth. Deep breaths, she told herself, don’t fall apart. Cold air burned her lungs, but it was better than the numbness that had engulfed her body as she watched the older girl tumble down in what seemed like slow motion.
Julia had read about it in a book once - L'appel du vide, the French called it. The call of the void. It’s when humans are at the top of a cliff face, or next to train tracks, and suddenly get an overwhelming urge to throw themselves off the ledge or in front of the train.
If she’d ever experienced that before, the sight of a girl’s body crumpled like a paper doll on the sidewalk banished it forever. After stumbling back from the edge of the roof, Julia leaned over, resting her hands on her knees as she tried to catch her breath.