That guy with the tree was lucky that it didn't fall the other way. Looked like a tall tree, with roots that size. But, you were so lucky in that it was that bad and you didn't have damage I think, others did. Or did you have damage? Trees are great, but, sometimes, preventive measures are best. The two of mine up front weigh down the wires, that is why they are going, they have been pruned more than enough and one is kind of hollow in a spot. I will replace them with something which wont get that tall again.