1. Eugene School of Karate, 116 S. 4th St., Springfield, 541-543-4166, EugeneKarate.com. 2. RMA Martial Arts, 2709 Willamette St., 541-344-0404, RightMentalAttitude.com. 3. Best Martial Arts Institute, 795 Almaden St., 541-345-0684, Bmai.org. Anybody who’s done martial arts, or a combat sport, knows how quickly it can…