[AJames]

Originally Posted by glenc

A "large" US spy satellite has gone out of control and is expected to crash to Earth some time in late February or March, government sources say...In his estimate, the satellite weighs about 20,000 pounds (9,072kg) and is the size of a small bus.
http://news.bbc.co.uk/2/hi/science/nature/7211443.stm

Gosh! Duck and Cover...

Odd Question: if you knew such a weight was coming down over the neighbourhood, would you have time to see the decent, and at at the last moment just get of the way? Let's hope it drops over the ocean somewhere!
I presume such satellites would break up in the fiery return before hitting the ground - which means it wouldn't be a problem, though if nuclear powered and it was fairly old you probably be worried about radioactive fallout.