UPDATE: Grammys Executive Producer Ken Ehrlich has apologized to Reznor in The Hollywood Reporter:

I’m sorry he was upset. I was really thrilled that we were finally getting him on the Grammys. The final jam started with Arcade Fire a few years ago, and LL Cool J last year. I want to end on a high, an up note. I did tell them we’d take it as long as we could. The number was about five, six minutes long, and we got to within a minute twenty of the end. We got as close as we could possibly get.

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Nine Inch Nails TV performances are rare things indeed, and when Trent Reznor steps in front of a camera, he expects things to go a certain way and gets pissed off when they don’t. Last night, they didn’t. Nine Inch Nails — along with the rock-dude supergroup of Queens Of The Stone Age, Dave Grohl, and Lindsey Buckingham — closed out the Grammys telecast with one of its best performances, a medley of NIN’s “Copy Of A” and QOTSA’s “My God Is The Sun.” But the Grammys, which had already lasted about 57 hours, decided to cut things off a bit early, running info about sponsors over the QOTSA song. As Reznor Tweeted this: “Music’s biggest night… to be disrespected. A heartfelt FUCK YOU guys.” And seriously, if they had to run that sponsor stuff, couldn’t they have done it during that endless Ringo Starr performance?