Patricia Clarkson, who plays the ruthless head of a corporation in eco-thriller “The East,” thinks powerful people can be scary. “I have seen people in power, and witnessed powerful people, and they are frightening,” she told us at a screening at Landmark Sunshine. “I am a news junkie, and it’s astonishing watching what they are capable of doing.” But, “I am glad I could never, and that I don’t, run some massive business.” Instead, “I sometimes just really want to lie in bed.”