There is a whole quantum physics science built around the perception light is either a particle or a wave depending on the observer. The fatal flaw is when they take it to think light only exists because they observed it and its nature is determined by the observer, therefore all creation is created by observation, therefore every state of everything must pocess all possibilities until observation. We must be gods.

This demonstration is a wonderful way to illustrate the observee cares not for the limitations of the observer. It is what it is no matter what we see.