Science Museum Oklahoma Educator Riley Flynn helps Lincoln Nickell, 5, of McLoud, pull back a "Stegosaurus tail" that will strike Simon the test dummy, who is wearing Nickell's specially-designed protective breast plate, during the "Impact Engineering: Outstanding Dinosaurs" McLoud Public Library program, held at the American Legion Ray Large Post 244 on July 30. A successful test was one where no holes were made in the cardboard. Photos by Natasha Dunagan, Countywide & Sun