This is what Slash said in an interview in Guitarist Magazine:
Superhuman
Spiky single-note riff dominates another industrial-tinged rocker
Sample lyric: "Cocaine / Alcohol / Lady-lay / Withdrawal"
*"It's my guitar riff and Duff's bassline that inspired it. It's my Les Paul, but I did have chorus on the riff just to stop it sounding too flat. It's pretty unique but it's hard to play. We played it the other day and I'm like, Okay I can do this. It's a quirky kind of thing and you just have to get used to it. Now we're in rehearsal we'll keep playing until it sounds good. The other day the guys didn't feel like playing it anymore and I'd be like, Can we play it a couple more times so I can get this riff down?"
So it's my understanding that the guitar line is kind of awkward for Slash and that's why the band hasn't been playing it live.
No, that quote is about recording it, Slash wanted to finetune it in the studio more.
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