Anyone who's watched 5 Million Years To Earth is now shuddering

http://www.columbian.com/news/2013/dec/11/mysterious-object-blocks-seattle-tunnel-drilling/

Here's what's going to happen:
http://www.youtube.com/watch?v=v5xPvFjPhkQ

http://en.wikipedia.org/wiki/Quatermass_and_the_Pit_%28film%29