Toward the end of the movie, when Nomi visits Cristal in the hospital, she says goodbye and they kiss. In one take Cristal's lipstick is smeared, from another angle it is perfect, and the picture switches between the two takes a few times.
After Nomi's friend is raped at the party, she's in the hospital where the doctor reveals that she's had vaginal tearing, then after he leaves Nomi tries to call the police to report it and Zack stops her. But the police should have already been notified by the hospital as is standard procedure with suspected sexual assault victims.
It is standard practice in Emergency Medical Services to put the patient in a cervical collar (a plastic collar that immobilizes the cervical spine) in any fall, even if there is no initial evidence of neck injury. Yet Cristal does not have a cervical collar when EMS personnel are carting her out on a stretcher after her fall.