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Jackson Kuhn, 7, says he is trying to scare the Tyrannosaurus rex dinosaur model on exhibit at the Greensboro Science Museum while visiting with his uncle, Mike Nichols. Jackson delivers his own intimidating faces and sounds back at the model dinosaur on Thursday in Greensboro. Jackson said if he were to face a real T-Rex, a punch to the nose would be his ticket to safety. The T-Rex, one of the largest flesh eaters to ever roam the earth, could be 23 feet tall, 50 feet long and weigh up to 8 tons.