Mo. Rev. Stat. § 10.115
10.115 Official state exercise — jumping jacks.
10.115. Official state exercise — jumping jacks. — The exercise commonly known and referred to as "jumping jacks", which was invented by Missouri-born General John J. Pershing as a drill exercise for cadets when he was a tactical officer at West Point in the late 1800s, is selected for and shall be known as the official exercise of the state of Missouri.
(L. 2014 H.B. 1603)