The MythBusters crack open their history books for a myth straight from Americas past. During the Civil War, did the Confederate army use a machine gun powered entirely by steam? To test this myth, Adam and Jamie use their knowledge of force, inertia, and acceleration to construct one of the most complex machines they've ever built. Next, Kari, Tory and Grant learn about the physiological and psychological effects of stress as they try to beat a lie detector.

Teacher's guide available under Additional info tag.