This happened to me when I was CC at Aberdeen on a 1-11 in the early 80's. We were empty and positioning the a/c home. It had snowed lightly and we pushed back too far into the grass. The skipper was determined to get home as he was going out to a dinner party so he just powered us out of there. The a/c was shaking like a bugger at near full power but we popped out of the mud and he slammed the brakes on as we hit the tarmac. We then taxied out and took off