What the hell is this?!

What the hell is this?

erm...I cant remeber what it is, though i remember a few scenes from it.
its a film
sort of a parody of the wizard of Oz
but scarier

in one scene
this girl is walking through the witches lare while the witch is in bed.
the white witches lare is a corridor of head in glass cases.and the witch is headless in bed.The witch choose which head she wants to wear.
but its scary but i remember it being realy good
there is another scene at the very start were this girl has problems and she is sent to a mental hosital by her mother and then she escapes, runs through the woods at night and falls into the river,gets on a draft and falls asleep and when she awakes she's in this land,like the wizard of oz
i just remeber in the story there was a broken yellow brick road


please help me
what is it called?
xxxxxxxx

I think its Return to Oz
That night, when Dorothy is scheduled to undergo her therapy, there is a violent storm. As the medical staff is preparing Dorothy, the electricity goes out, and she is left alone as the doctor and his nurse go to check the hospital's generator. While they are gone, Dorothy is freed by the mysterious girl she had seen earlier, and together they escape from the hospital. The doctor and nurse return to find Dorothy missing, and begin to hunt for her throughout the clinic and surrounding grounds. Fleeing the nurse in the storm, Dorothy and the girl fall into the violent floodwaters of a neaby river. The girl helps Dorothy pull herself up into a wooden chicken coop; Dorothy attempts to