 The Wachowski Brothers approached Warner with the idea of the Matrix  and Warner balked at the budget they had submitted. Over eighty  million dollars. Warner instead agreed to give them ten million. The  Wachowski Brothers took the money and filmed the first ten minutes  of the movie (the opening scene with Carrie Ann Moss) using the  entire ten million. They then showed the executives at Warner the  opening scene, and Warner was so impressed, they green lighted the  entire asking budget.