Mary Elizabeth Winstead was so determined to "look cool" in Scott Pilgrim Vs. The World, she developed an agonizing case of tendonitis while filming her fight scenes.
Winstead plays the title character's love interest Ramona V. Flowers in the big screen adaptation of the graphic novel and she completed a variety of stunts, including back flips, high kicks and tumbling down stairs.
Her favorite scenes involved swinging a giant hammer, but Winstead admits she hurt herself with the weapon, injuring her shoulder and developing tendonitis.
She tells Britain's Total Film magazine, "I get to use it like a really cool weapon, kung fu-style. It was just really fun to get to learn that and execute it in a way that looks cool on screen. It feels really rewarding. It was tough, but I definitely felt tough and crazy."