I was hit by a car from behind in my early twenties. I sprung up after the impact to look for the person I was walking with. I had a few scrapes and a deeper cut in my arm but nothing that I even noticed for a few minutes. The next day is when that kind of impact gets you. For weeks after, taking an elevator or riding a bus would hurt. It took months to take any running steps. I feel really bad for this girl, it's a big deal even if she's walked it off at the time.