We all know that accidents happen. It's part of life! Sometimes there's a viable excuse ("I didn't want to hit the cute squirrel/bunny/dog/giraffe! I had to swerve!"), but sometimes, it's just better to keep your mouth shut, lest you come up with something like this.
P.S. I think my personal favorite is, "I pulled away from the side of the road, glanced at my mother-in-law, and headed over the embankment." Priceless.