Hello all - I'm at the end of a project in my backyard. It consisted of digging a 4 ft hole, 8 inches wide; which I've done. Problem is, there is a rock in the very bottom which I cant seem to figure out how to get it out. It's an oval shaped rock (approx 8"x10"). The hole is too deep for me to grab onto it. My breaker bar has a hard time making good contact with it since it has no flat surface, so I can't break it. And my post hold digger is too small to grab a hold of it. Any suggestions?!? Thanks!!