A while ago, a friend of mine, excellent folk/jazz/pop/classical fiddler, was busking outside a branch of a major shoe retailer in Cardiff. After about 20 minutes, the manager came out to ask whether he could move along, because customers were reluctant to browse the window behind him.

He looked in his tin, and said "I reckon in another 10 minutes I'll have enough to buy my son a pair of shoes." Which he had, and he did!

Phil