Summer Bishil stars in “Towelhead,” about a Lebanese American girl’s coming of age in Texas during the first Iraq war. "To Bishil it was a relief to find a part that not only suited her ethnically but actually resonated with her. Still, she found one particularly violent scene was upsetting. Afterward, she remembers going back to her dressing room and “having a little emotional tantrum and crying. And being very sad. I was really tired too... I didn’t realize the toll it took on me, until now.”