Muay Thai มวยไทย is combat sport from the muay martial arts of Thailand that uses stand-up striking along with various clinching techniques. This sport includes the combined use of fists, elbows, knees and feet.
Brazilian Jiu Jitsu is a Grappling Martial Art which spezializes in Ground Fighting Techniques. The Aim is to control the opponent and eventually use a Submission technique to render him unconscious or attack joints. Of course this is trained in a friendly and respectful manner without any danger.