When it can't be done. Do it. If you don't do it, it doesn't exist.

"A NEW idea can be either unfamiliar, or silly, or both.
It can't be judged by description. It needs to be done (made) to exist.
It is unlikely that anyone will sanction the cost of something they don't understand, therefore you have no choice but to do it yourself.
At whatever cost.
You may have to BEG, STEAL and BORROW to get it done. But that's for you to work out how you do it.
It's exciting.
It's difficult and it's fun.
If it was easy anyone could do it."

(Paul Arden, Executive Creative Director Saatchi and Saatchi for 15 years. In his book: "It's not how good you are, it's how good you want to be")