One of my favorite effects at Disney is at the Tower of Terror...when the doors open on the ghost scene, a lightning strike causes the ghosts to fade out into static....but then the lightning lingers, and creeps across the walls. It does this again in the 5th Dimension room. The same effect is used at the new Test Track (lightning bolt hits in front of you at the old "antilock brakes" test) and at the Indiana Jones Adventure rides at Disneyland and DisneySea when the riders pass the Eye of Mara/Crystal Skull reveal. So...how does Disney do that? I always thought it was laser projections, but I've heard some people swear that it's fiber optics.