If you want to get an idea of what the (Large Hadron Collider (LHC) experiment is all about - I've found this basic intro on Alice, CMS, Altas, LHCb and the Grid to be very well presented and organized.
Here's "Rock-star physicist" Brian Cox explaining the LHC on TED.
Prophecies of doom notwithstanding, this certainly sounds like a very exciting experiment - a hugely collaborative effort that will hopefully unlock some of the dark secrets of the universe. Here's the coolest science video I've come across :)
And if you want to get really spooked, check this one out...
But after that watch this one to be reassured - "YOU WON'T FEEL A THING!"