I did something stupid today and I'm blaming it on the cold weather. On my way back to home base after doing my usual 25 miles, my fingers were freezing and I decided suddenly, even surprising myself, to take a shortcut instead of going another 1/2 mile to a light with a left turn lane. I glanced behind and saw clear road and nothing coming around the corner ahead of me so I swung a wide left arc across 3 lanes plus a center turn lane. I was moving about 15 MPH and had just reached the center turn lane when a pickup came flying around the corner doing close to 50 MPH. I aimed straight for the far shoulder and swung hard left at the last moment to keep from going over and into the ditch. I had barely straightened out on the shoulder and now heading in the same direction as the pickup when he went flying by with his horn blaring. It's a 40 MPH zone, but I feel completely at fault and like a real idiot. Won't happen again. I don't usually do stupid stuff like that, but I am old and I was cold, does that justify my actions?