Drew Barrymore rewrote 'Whip It' because Ellen Page had already played a teenage mother.
The Hollywood actress-turned-director - who makes her directorial debut and stars in the movie about a roller derby team - altered scenes where Ellen's character was due to lose her virginity because she had played a pregnant teen in 'Juno'.
She said: "Well there was a loss-of-virginity scene, but having done 'Juno', I think seeing that scene play out with Ellen would've seemed, well, improbable. So I had to come up with something else for the love scene. There's a great scene - it's one shot."
Determined to do something different, the 34-year-old movie star said she sought inspiration for the love scene - which is filmed underwater - from a previous big screen hit.
She explained to Moviehole: "In 'Vicki Christina Barcelona' where Scarlett Johansson and Javier Bardem are captured making out in this beautiful way, on a hand-held camera, it's just very cinematic and intimate. That was a good place to start.
"I didn't want to show them having sex and I also didn't want to just have them making out, so I decided to do something more unorthodox and playful - which as an actor, I'd rather do anytime.
"I really wanted it to make it so that you were right there in the middle of all the action. But I also wanted to do a lot of hand-held shots, so you could cut it in a very traditional way - sort of like a hockey movie. It was hard for me not to choose a sport where you're like 'just put the ball over there' or 'put the ball in the hoop' because this is one that's hard to follow visually.
"You also have the responsibility of keeping it fun, whilst trying to tell a little story along with each game that furthers the movie along. I just tried to combine all the elements and maintain action and comedy to keep it moving forward."