The reason for this photo being labeled educational, is that once again we learned the destructive nature of an 80,000 lb. mixer rolling over an 80-year old super thin and brittle city sidewalk, which you can see is buckled and wasted here. We take our chances, but the alternative is having a pump truck on the street for anywhere from $4-800 extra dollars, which probably might have been better than having to replace this section for free.