Revealing mistake: When Johnny shows up to Cobra Kai dojo and all the kids are there. In the video playback they show on the phone you can see Miguel didn't land the kick, and the kid just fell down. (00:28:18)
Cobra Kai (2018)
1 revealing mistake in season 1
Starring: Ralph Macchio, William Zabka, Courtney Henggeler, Xolo Mariduena
Continuity mistake: Miguel kicks and breaks a staircase railing during the school brawl. For a second it cuts to Robby. When it cuts back to Miguel, the railing is fixed.
All Valley - S1-E7
Samantha LaRusso: Aren't we supposed to avoid fighting?
Daniel LaRusso: Sometimes you can't. Someday the fight may come to you. And I want to make sure you're ready. So today we're going to see what Miyagi-Do is made of.
Trivia: Daniel stumbles in on his daughter kissing Miguel. He then suggests to her he would like that they the door open, to which his daughter replies "come on dad, it's not 1984." The original Karate Kid was released in 1984.
More questions & answers from Cobra Kai
Answer: Both.