This is a very fast growing, gets very tall, yet easy to chop down bush that I am curious what it is called. It came out of nowhere two months ago and has taken over alongside my driveway. The reason I have not chopped it down is that it hides my neighbor's [actually another subdivision] nasty back yard and patio from my sight and also keeps them from viewing me every time I open my garage doors or am active on that side of my house. Any horticulturists in the audience ? Thanks.