I was up in MN for some seat time with cheechNchong and I was told I'm going too fast. So I turned it down a notch and this happened. As I was trying to keep it under 55mph, (everyone else wasn't) I was entering the chicane and I cleared the 1' tall cone but my driver's side mirror didn't clear the barrel that was next to the cone. The mirror shattered to pieces and I need a new one.