Got A Good Idea?

There is a slim chance that asteroid Apophis will meet and collide with Earth in the year 2036.  I won't be around to worry about it but there are a lot of people who are worrying.  Now the Planetary Society is offering a $50,000 prize for the person who comes up with the best idea for planting a transponder on the 400 meter rock.  Personally I think we should call Bruce Willis.