Uncanny... In fact I was thinking of starting a thread about this myself!
I must've seen the first two films a hundred times when I was a kid! So many memories...
I remember having this violent hyperventilation attack when I was about seven or eight. Scared the heck out of me and my parents didn't know what to do... I really thought I was going to die!
What I ended up doing was dash outside to the garden and run circles in the middle of the night, singing the chorus of 'You're the best around' (the song by Joe Esposito at the climax of part one) over and over again... That made it go away.
I never had any attacks of hyperventilation in the twenty years since but if I do, I'll know exactly what I'll have to do
I also had gotten this two-pack of action figures, Myagi and Daniel that came with huge plastic chopsticks (connected like tweezers) with a huge rubber fly tied to it. That way it was easy for little tykes to catch a fly using chopsticks
At one point, they even sold the little handdrums (as seen in part two) in my favourite local theme park. My mom bought me one and regretted it soon after. Drove my family nuts with that
I'm sure I'll remember some more Karate Kid related memories later...