There is a fascinating review in Nature Reviews Neuroscience this month about the cognitive science of magic tricks

The article attempts to list and describe in neuroscientific terms the techniques that magicians use to trick their audiences. The authors break down these into "visual illusions (after-images), optical illusions ('smoke and mirrors'), cognitive illusions (inattentional blindness), special effects (explosions, fake gunshots, et cetera), and secret devices and mechanical artifacts (gimmicks)." The use of visual illusions to study perception is certainly nothing new, but the emphasis on cognitive illusions -- illusions that trick higher order perceptions like attention and judgment -- is novel.

Attention and awareness in stage magic: turning tricks into research