Hack into the ultimate supercomputer ' the human brain ' as Hollywood filmmakers use color, light, motion, depth and sound to create mind-bending sensory illusions. Is it possible to feel the sensation of accidentally cutting your finger ' just by watching TV? Much of what we experience may be a mere fabrication, as our brains fill in gaps and stitch together a complete picture of the world bit-by-bit, designed to overcome our eyes' blind spots. But what happens when your senses get crossed?