Actress Olivia Munn has dislocated her shoulder after flying off a swing. The Iron Man 2 star was swooping back and forth on the hanging seat when it suddenly snapped and she slammed into the floor. Munn took to her Twitter.com page to share a clip of the accident, writing, "Goin (sic) really high then it broke mid-swing. Bad news - dislocated my shoulder. Good news - I laughed and we got it on video." In the clip, Munn can be seen giggling as a pal pushes her on the swing but after she crashes, she moans in pain and says, "Oh f**k! I wanna laugh but..."