The key point about a demonstration is that it must be seen. Hence the term "demonstration." If a person demonstrates privately in his own home, this is not technically a demonstration but merely "acting silly" or "behaving like an ass.
Woody AllenAs a boy, I was ashamed to wear glasses. I memorized the eye chart, and then on the test they asked essay questions.
Woody AllenThere's something about my films; they're informed by my sensibility. I have the same preoccupations, the same interests... there's just something in the nuance, and so you always know it's a film of mine whether I sign my name to it or not.
Woody AllenHow does gravity work? And if it were to cease suddenly, would certain restaurants still require a jacket?
Woody Allen