What a wonderful thread! Raises all sorts of reflections.
Wasn't there a film called 'Johnny Nobody' about a man who shoots someone in Ireland and claims that he doesn't know who he is but God told him to strike down the unbeliever. Don't worry --- he gets a marvellous comeuppance at the end.
Then there was 'Dangerous Moonlight' with Anton Walbrook and Sally Gray, in which a former concert pianist loses his mind and sits in a mental home bashing discordantly on a piano for ages before he recovers and remembers that he wrote the 'Warsaw Concerto'.
Then there's a question about how useful clothing labels are in identifying people. The shirt I'm wearing came from somewhere in the Far East; my sweater has 'San Francisco' embroidered on the front and 'Made in the USA' inside the collar; my slacks come from Belgium, and the jacket I was wearing earlier comes from Norway. But I'm British and acquired them all in the UK.
Finally, this thread reminds me what a privilege it is to belong to the worldwide community of musicians and music-lovers, who are so humane and caring it nearly makes me weep.