Actor James McAvoy was mortified when his family once came to watch him onstage - because they were greeted by the sight of his dangling penis. The young actor had to strip off for a scene in the show, but although he has no problems going nude, he suddenly lost his nerve when he spotted his sister in the audience. MCAvoy says, "On stage there's nowhere to hide, you're completely vulnerable. When you're completely vulnerable, it can't get any worse, can it?" "I had to be naked for 10 minutes for this play and I noticed, 'oh, that's my sister. She's head level with my c**k, oh no.'"