The Grammy’s are a big night in music and its broadcast all over the world. So, naturally you want to do your best. What if the sound guy or a stagehand doesn’t do their best? Lars Ulrich said you just have to go on. He also added that he hadn’t see James that upset in close to 20 years. Check out the video of Lars talking about it on The Late Late Show with James Corden below. My guess, it’ll be quite a few years before we see Metallica performing on the Grammy’s again.