Continuity mistake: When Marlon Brando is gunned down at the fruit stand, he drops the bag of fruit he just bought. However, when he's collapsing against the car, the bag of fruit is now on the hood of the car. (00:43:05)
Continuity mistake: Mr. Kelly pimpslaps Rita as she is grabbing her things, and he walks away to answer the phone. Between shots, the mules on the table have rotated, and in similar fashion the suitcase is also now parallel to the side of the table instead of being at an angle. (00:34:30)
Revealing mistake: During the iconic dojo brawl scene, Bruce Lee at one point picks up two men and whirls them around. It's obvious in the wide shot that they are just dummies.