Kieth I agree the mantle probably wont slip like you say but alot of other things could go wrong, check out the gamma emissionsthey detected at the rim of the milkyway and the weakening of the electromagnetisphere already happening, which could account for the catagory 5 hurricanes earth has been having in recent years not to mention the indonesia quake that slowed the earths rotation and knocked the north pole for a loop, and the earth quake in china recently.

Also I read up on CERN'S Hadron super collider on the borders of france and swiss boarders, I think it is doubful anything will happen when they fire it up, even though peeking in Gods little black book of secrets is a not the best idea, and performing a science test based soley on theory risking that something could happen is even a worse idea, I guess they must know what they are doing if it were a real threat I am sure our goverment and others around the world would put a stop to it.

here are some comments based on that news for this wedsdays te4st of the cern super collider.

http://www.youtube.com/watch?v=Y2B0Q1jYngQ

http://www.youtube.com/watch?v=PVjTwiEp5Ek&feature=related

http://www.youtube.com/watch?v=c-04mQQd96k&feature=related

http://www.youtube.com/watch?v=MhTO9n-F_ig&feature=related

http://www.youtube.com/watch?v=Y0lHJOEtrko&feature=related

http://www.youtube.com/watch?v=WFMCTF4R4Jc

http://www.youtube.com/watch?v=KRl9gthR1sk&feature=related

http://www.youtube.com/watch?v=r5Sjya1fh0w&feature=related

http://www.youtube.com/watch?v=WsNHG3undqI&feature=related

http://www.youtube.com/watch?v=oWAtH5erfG4&feature=related

http://www.youtube.com/watch?v=z7yZ5LEL5es&feature=related