Girl getting mutilated

[Jacknife]

When it comes to losing some limb, some piece of my body, i really get grossed out; i would prefer to die if i lost my legs/arms/penis/eyes/whatever, really, so i get kinda freaked out when i'm threatened of being mutilated, because i know that i'd need to die afterwards (because i wouldn't keep living with some piece missing) and end my life there... but i still have some stuff to accomplish before dying, so just let me have some more time, kay?

This is a little introduction, just in case it was needed to help me interpret this dream:

First thing, i'm the observer in this dream; i'm not the protagonist, noone is threatening me or stuff, i'm absent from the "cast"; there is a girl, a cute blonde naked girl, bound to some sort of white bed, in a wide and white room (a huge white room, with nothing in it, beside the girl and the white bed). There are 2 dudes, whose faces i can't see, because i'm looking through theirs eyes (even tho i'm not any of them, because i would never do the things i'm going to tell, and neither i would enjoy such shit; it's like a movie, where you take the point of view of the torturer, just that): one of them is holding an item that is used by doctors to "cut"; it's a sort of round blade mounted on a support, but has 3 blades, like this
_______________
|______________|--------|-|-|
And he was piercing the girl's leg with it, while grinding her meat; another dude, with a chainsaw, cut her right hand fingers; however, her fingers were still attached for a little piece of meat and then... he just started cutting off her arms and legs, leaving only the body. In all this mess, the girl's expression was firm, emotionless, like she wasn't feeling anything, not even letting out a scream, not crying... not doing anything... and i was feeling really bad for her, because she was beautiful, and i felt like i could fall in love with her (before she started getting horribly mutilated).

What is the meaning of this dream? Does the white background represent anything? Why am i watching a beautiful and lovely girl getting mutilated by freaks and feeling so horribly bad for her? Also, i realized that her emotionless expression bothered me; i was wondering "why doesn't she cry?" "doesn't she feel anything? What is she trying to demonstrate?"

PS: the night before i didn't watch any kind of horror movies; i actually don't watch one since 2 years or something, and i'm usually okay with them; i'm not scared and can bear anything, even mutilation; i just feel bad when it's the protagonist getting his limbs cut off (or his girl, perhaps). Also, i haven't experienced any kind of accident, and neither the ones i know had (So no trauma or things like that).

Thank you for the answers.

[Jacknife]

Searching in my memories, two movie scenes actually came up:

One is from Hostel, where some nazi torturer chops off a boy's fingers with a chainsaw: the exact same thing happened to the girl

One other is from House of 1000 Corpses, where a guy is getting his leg drilled with a drill (the scene i had in my dream had the girl getting her leg drilled/grinded with that "item")

Neither of those movies moved me (the latter was even funny in some ways, because some heavy metal music was playing in the background, lol, like it was cool), and i even watched them long ago, and never had dreams of them or the kind.

[OracleofDreams]

After reading your nightmare, I can see that your dreams are telling you that you need to overcome that thought of ending it if you were to ever be mutilated. The girl in your dream might very well be the subconscious strength that you do not know you have. She is emotionless she refuses to give up and stands firm even though these men are mutilating to her. The thought of mutilation sickens you and you worry that you would not be able to continue or complete things that you would like to do in your life. Maybe this girl is trying to tell you that even though she is now mutilated she will continue doing everything she can to continue and live life to the fullest extent, and that mutilation should not restrict you from doing the same. Living with fear is brave, overcoming it is by far the most difficult but when achieved leads to a happier more fulfilling life.

~~~~~Oracle of Dreams~~~~~