Lyric discussion by dickprick 

Cover art for Chloroform lyrics by Porcupine Tree

Couldn't it be possible that the lyrics describe just the effects of a chloroform anesthesia. The insanity and incoherent are possibly caused by a state of consciousness quite related to the effects of the dissociative narcotic diethylether. Maybe a raper or murderer just narcotized his victim and these are her last thoughts running through her brain befor fading to the narcosis. Well this was my first notion when hearing the melody without focussing the lyrics...

I think dickprick kinda has it...I don't think that the song is about the killer himself whose action are widely described in In Absentia... the killer has just narcotized the victim or maybe is even killing the victim by forcing him/her in someplace with an high concentration of chloroform in the air (this way of killing people has been already used since it provides a slow and gradual death). So the whole song is about the last thoughts that rush trough the mind of the victim, in an hallucinated stream of consciousness... beautiful, anyway, as anything by Steven Wilson....