Los Angeles, Nov 16 (TIWN) Oscar-winning star Halle Berry, who has gone behind the camera for the first time with 'Bruised', has revealed that directing the upcoming film was her toughest challenge.

Talking about it at a Hollywood screening, Berry told The Hollywood Reporter: "I don't know how I did it. I was on some adrenaline, I was on a high. I had to get this out of my body and so I had to do it, I just had to keep going day after day and I was energised by it, I was ignited by and I was refusing to be told 'no'."  She had been despairing that no filmmaker could match her vision for the project until a producer suggested that she should take the bold step of directing the film herself.