What's the first thing that comes to mind when you think Trent Reznor? Is it Nine Inch Nails, his industrial metal outfit whose most popularly mainstream song describes, in graphic detail, wanting to fuck you like an animal? Is it the TV and film scores he's co-created with Atticus Ross, like the one currently thumping through Damon Lindelof's Watchmen, most of which feel like they're soundtracking an underground kink club 2,000 years into the future? Is it Pixar? It's probably not Pixar. But Reznor is, in fact, bringing his unique talents to the …