I put in a new fence in my backyard last spring and one corner post never sat straight. I kept shoving gravel and soil around it thinking that would do the trick. Finally after 8 months of looking at that stupid lean I dug the whole thing out and found a buried rock the size of a basketball. Took me one afternoon to reset it with proper concrete and a level. Now I check for rocks before I dig any hole. Has anyone else dealt with something simple that turned into a whole ordeal because of what was hiding underground?