Cas-On the head of a pin

^^ What it says in the title :)

My body seemed to snap into action, registering quicker than my brain what had just happened. My senses all woke up suddenly and at the same time, and I acknowledged a warm sticky liquid trickling down my face. One side of my face felt like it was on fire, and one of my arms didn’t feel so good, either. Without looking, I moved my feet, legs and arms slightly to check there was no serious damage. I breathed out heavily, fighting back tears.
It began to come back to me, bit kwa bit, as though in slow motion; the truck, the overwhelming impact, the Impala being...