Kemsey

Okay, bear with me here because I don't know much about this song. I got this song a couple years ago on my IPod and now I can't remember it. It started out with a xylophone in the beginning and has a girl singing all the way through. It's a kinda dark song, slow I think. And it think it had a lyric like "I poured acid down his throat" and maybe had something like "I shouldn't have pushed" (I wouldn't really trust these lyrics because my memory is bad) so that's as far as I can remember lyric wise, but I do remember very vividly the xylophone in the beginning. So if you can, please help me find this song?

(I found the song! It's called, it took me by surprise.)