BOB WALL(source wiki)USPK karate champion and co-star in Enter
the Dragon, recalled a particularly serious encounter that
transpired after a film extra kept taunting Lee. The extra yelled
that Lee was "a movie star, not a martial artist," that he "wasn't
much of a fighter." Lee answered his taunts by asking him to jump
down from the wall he was sitting on. Bob Wall described Lee's
opponent as "a gang-banger type of guy from Hong Kong," a "damned
good martial artist," and observed that he was fast, strong, and
bigger than Bruce.
Wall recalled the confrontation in detail:
"This kid was good. He was strong and fast, and he was really
trying to punch Bruce's brains in. But Bruce just methodically took
him apart." "Bruce kept moving so well, this kid couldn't touch
him...Then all of a sudden, Bruce got him and rammed his ass into
the wall and swept him, he proceeded to drop his knee into his
opponent's chest, locked his arm out straight, and nailed him in
the face repeatedly."
After his victory, Lee gave his opponent lessons on how to
improve his fighting skills. His opponent, now impressed, would
later say to Lee, "You really are a master of the martial
arts."