From Fr. Z's post on the story:
Edition 2, 2018 of Maria Legionis, the magazine of the Legion of Mary, gives the text of a talk given by the Servant of God Frank Duff, founder of the Legion of Mary, on “Legion Humour”. It includes this story:
“Another example would be St. John Bosco in whom humour was as a running river. Like many another saint, he was accused of eccentricity. And on one occasion this caused him to be put into the custody of two Canons to convey him to a mental home. Arriving there, he got out of the vehicle first and formally handed over to the custodians of the institution the two high dignitaries who were with him. He explained that they would probably be a little violent at being held, which certainly proved to be the case. All the excited expostulation of the two Canons and their efforts to explain things were not heeded. John Bosco, who was calm itself during the incident, finally took his leave and departed in the vehicle leaving his former escort struggling in the hands of their captors.” - Fr. Z's Blog
Thank you Fr. Coyle! Thank you Fr. Z! Thank you Fr. Bosco!
Sounds like a scene from "Harvey".
Elwood's sister, Veta Louise Simmons,
tries to have him committed to a sanatorium.
In exasperation, she admits to the attending psychiatrist
Dr. Lyman Sanderson that,
after so many years of putting up with the invisible rabbit,
she sees Harvey every once in a while herself.
This causes Dr. Sanderson to let Elwood out and lock Veta up.