Users may not be aware of the migration, and as of yet IT may not have a strategy to define the movement.

FORBES: The Great Enterprise Migration to the Cloud Begins

Even though a person may not be consciously aware of movement or of unexpected appearance, the brain detects it and triggers the P-300 brainwave, a brain signal that is thought to be involved in stimulus evaluation or categorization.

ENGADGET: DARPA threat detection technology uses a camera to see targets, software and soldier brains to identify them