Little did he know that the artist was secretly photographing him to include him in his next artwork.

The stencil artist – who is known only as 'DS' – painted his first piece of 'Bad Kitty' graffiti on a wall in London in May in a piece intended to be a comment on the "squeaky clean image" of the Hello Kitty cartoon.

However, DS, 28, from London, was surprised to find the graffiti being removed just eight hours after he'd finished the work.

Wanting to document the removal, he decided to photograph the worker and use his image as inspiration for a new piece of work on the same wall.

A month later, the piece is still on the wall in Essex Road, Islington.

Revenge is sweet when served with a generous helping of humor (or perhaps we should spell it "humour" here, as this is an English article).