Professional wrestling is a mode of spectacle, combining athletics and theatrical performance, held primarily in North America and Oceania. It takes the form of events, held by touring companies, which minic a combat sport. The unique form of sport portrayed is fundamentally based on classical and catch-as-catch-can ("catch") wrestling, with more modern additions of striking attacks; strength-based holds and throws; and acrobatic maneuvers. Various forms of martial arts have influenced the genre. An additional aspect of combat with improvised weaponry is sometimes included.