Myotonia Congenita:
An inherited, neuromuscular disorder that makes the muscles unable to relax for about 10 seconds after contraction when startled or excited.  Episodes are painless and the goat remains awake until the stiffness passes.  Myotonic goats don't jump or climb fences much like other goats, making them popular with goat keepers; however, because they can "faint" instead of running away from predators, good fencing is still important to keep "bad guys" away.                                                                                        
Also Known As:
Tennessee Fainting Goats, Nervous Goats, Stiff-Leg Goats, Texas Wooden Legs Goats, Fainters, and Scare Goats.   
Origin:
Tennessee, USA