That happened to me when I was younger. We (my family and I) were in the McDonald's parking lot one night, and I was standing right by our car, waiting to get into the front seat, and I was leaning against the door to the back seat. My brother deicided to slam the door right on my fingers. I didn't even scream, I just buckled over in pain with my mouth WIDE open in a silent scream. It took them a second or two to figure out what was happening, but when they did reopen the door, I didn't even have any broken fingers. But they were bruised pretty bad!
I hope that she gets better fast!