My friends mom is throwing up. she said the room is spinning and all she can see is black. what does this typically mean?

Go to the ER: The fact that her room seems to be spinning and she is seeing black suggests that her blood pressure may be low. She needs to be seen immediately for evaluation and treatment. Call 911 if she cannot be transported to the emergency room immediately. Good luck.

Dizziness/Vertigo?: I would advise you to take her to the hospital ER and get checked. it is often due to brain or inner ear problems, both of which require check up for a stroke. A Neurologist and an ENT doctor can be most helpful to treat her problem.