Sid Wilson was left with “serious burns” to his face and arms after causing a fire whilst working on his and partner Kelly Osbourne’s farm. The Slipknot rocker, 47, has reassured his fans he’s going to be “OK” – but he’s been left with some “pretty bad” burns after setting fire to a burn pile. In a video update from his hospital bed, he said: “Hi everybody, I had an explosion in my face. I’m ok, I’m gonna be ok, but I did have some serious burns to my face and my arms. I’m singed everywhere. Eyebrows are singed. My mouth is blistered. My arms [are] pretty bad. Both of my arms.” Sid’s girlfrien…