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A simple human deception

Disappearing elephant
- Crowd distracted by startle reflex
- Concealment from sensors by a curtain
Startle produces reflexive response
- Crowd turns toward crash noise for 1 sec.
- Black 'wrinkling' curtain rises in front of elephant. Rear wrinkling curtain conceals movement by removing edge line detection

Notes:

Here is an example of a simple human deception - the disappearing elephant.
In this case, we can see that this magic trick is easily explained by the cognitive model with deceptions. The metrics in this trick are determined by limits on human reflexes and characteristics of human vision systems. Such deceptions can achieve very high degrees of reliability for substantial sized crowds.