When I was a young man, I helped clean up tree trimmings then loaded them in the truck for my brother. He would take the tree down by cutting it in firewood sized pieces. He shut his saw down and yelled for the crew to come see something. We looked down at a piece that, at one time was two limbs. They had grown together to form a large oval shaped tree trunk. When he cut it he also cut thru the center of a golf ball someone had placed between the two limbs many years ago. Of course we didn't have cell phone cameras then and the phone we had had a dial