“Troy” star Brad Pitt wasn’t around to play hero — but when fire alarms wailed and emergency lights flashed, bringing a screening of “Troy” to an abrupt halt, it was star Orlando Bloom to the rescue! When the alarms went off, the audience feared they were under attack by terrorists and made a mad dash for the doors — but Orlando responded like a real-life hero and prevented a panic! Quickly taking charge, he shouted, “Everyone, please remain calm and walk to the nearest exit. Please do not push or shove.” Bloom escorted several older women out — then rushed back inside, and helped herd everyone to safety. When it turned out to be a false alarm, Orlando led everyone back inside, insisting that they just had to stay to see his tear-jerking death scene.