Kali Escrima, Brasilian Jiu Jitsu, Real aikido, Tai Chi Chuan... Igor Grujic is Ninjutsu Shidoshi - Black belt instructor , Wing Chun - Level 1 Provisional master grade ( at Grand Master Wiliam Cheung ), MALUCO folding knife instructor , tactical hand gun level 1, obstructed entry diver, nitrox diver, oxygen rebreather system diver ... and lot more on this site : www.sokocombatsystem.com ... "Filipino Kali Escrima" "Brasilian Jiu Jitsu" "Real aikido" "Tai Chi Chuan" "Wu Shu" UFC "Street Fight ...