How Did Adam Sandler Come Up With Opera Man?

Adam Sandler says Opera Man started with a man who sang opera on the street holding up a can. He'd come at you singing loudly, and you'd end up giving him money, and that's where Sandler first started doing the voice. Dana Carvey, who asked about it, calls the later Weekend Update version, with the pictures, one of the most indestructible killer bits of all time.