Reminds me of a story I read years ago, about some politician giving a soapbox speech to a crowd in England.
After each of the politician’s roposals, a heckler would shout “That’s good, but how do we know you’re not crazy?”
After several repeats of this question by the heckler, the speaker asked the heckler how anyone can prove they are not crazy.
Whereupon the heckler stepped forward and pulled from his pocket his signed release from a mental institution.
On a lesser scale, it reminds me of story some years ago where a heckler yelled out “Tell everything you know Will, it won’t take long.”
Will shot back, “I’ll tell ‘em what we both know. It won’t take any longer.”