Well that's not something you see everyday...

During a recent pilgrimage to Boeing HQ, took the factory tour where sadly photographs are forbidden. I did though get a chance to see a Dreamlifter takeoff in the rain, video right here:

They use the Dreamlifters (fleet of 4) to bring the various parts of the 787 (think fuselage, wings etc.) to Everett for final assembly and test. Very impressive. Turn your speakers to 11 for full effect.