This is the damage done by a Bradford pear tree in my neighbor's yard. They just split apart spontaneously with the slightest wind sometimes.
This is one reason I hate them. The other reason is they are very invasive; you see them popping up all over the place in cleared areas, crowding out our native trees.
Oh and I swear the flowers smell like moldy socks.
Thinking about planting a spring flowering tree? Why not a dogwood or a red bud?