The "Magic Pants" goof. Bruce Lee enters the Japanese Karate school for the first time carrying the framed and glass-covered "Dung Ya Bing Fu" sign. A fight between Bruce and the entire dojo breaks out. As he whirls around fighting his waist sash loosens and his kung fu pants sag deeply, revealing about three inches of white underwear from the back. Then a sudden cut shows Bruce posing motionless having defeated the current round of Japanese attackers. His pants? Tied up around the waist, nice and snug. Now that's some kung fu!