Originally Posted by Florya

There used to be an old guy, used to 'busk' in one of the underpasses near Marble Arch tube station.
I use apostrophes deliberately because his 'busking' consisted of letting out a really loud screech, stamping his foot once, and blowing randomly through a harmonica. Then he would stand there with his filthy hand outstretched asking people for money. The whole performance took about 5 seconds, but he would repeat it over and over and over again.

I used to watch him, spellbound, for 20-30 minutes and then give him all the change I had in my pocket. Genius.