In the scene where Daniel is being chased from the dance by Johnny and the gang and he runs through the open field behind his apartment complex. If you look closely at one of the trees in the middle of the field, you can see a smoke machine pumping out smoke to make the scene look foggy. Not very well hidden!
Contributed by: Edward Fong
In the scene where Johnny Lawrence rams Ali's radio at Daniel LaRusso, the speakers are initially facing Daniel; when Daniel, shown at a different angle, takes the radio's brunt in the belly and falls over, the speakers of the radio are facing Johnny! Oops!
Contributed by: Alex Ruiz
When Mr. Miyagi saves Daniel from Johnny and his gang by the fence, he picks up Daniel and puts him over his shoulder but on the very next shot he opens the fence and Daniel is on the other shoulder. In the same scene, Mr. Miyagi never punches Johnny in the face but the next day at the dojo he has a black eye.
A boom mic is clearly seen behind the car when Daniel goes to Miyagi's door before going to the Cobra Kai dojo.
Contributed by: Alex / Brandi
When Daniel gets beaten up after the dance he has a bruise on his face and a band-aid. He then goes on his date with Ali and the damage on his face disappears. The next day, when he enters Miyagi's back yard for his first day of training, the bruise and band-aid are back on his face.
Contributed by: Tom Hutchison
There is a scene where Mr Miyagi is trying to catch a fly with chop sticks, if you look very carefully, you can see the fine glimmering effect of the wire that is suspending the fake fly.
In the scene where Ali is dancing with her father at the fancy restaurant, we see Johnny sit down at the table next to Ali's mother. During the same shot Ali asks, "Hey Dad, what time is it?" The shot switches to an opposite angle, and the father replies, "Well, it's about...9:40" just as Johnny and the mother dance into the shot from the right side of the frame. There is no way they could have arrived there that fast from where they were sitting.
In the opening sceces where Daniel is unloading the car at the new apartment you can see the top of Freddy's head behind the swinging door long before he would have been there.
No doubt that the actor was already in position for Daniel kicking the door moments later and hitting him...
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