I will say what happened to me. When my son was about 10 years old he was watching that stupid Karate Kid 3, at least three times a day. I wasn't much concerned but asked him what's the point of watching this silly movie every time. Eventually one fine day, my wife threw the DVD away because she became so much irritated with this habit.
That ended the episode and about a month afterwards when I scolded him for something he gave me a solid karate kick saying its payback time.

I asked my wife whether she sends him for karate training as one of my cousins was running a karate class nearby. She said No and retorted - Why do you think he was watching that movie every day? He perfected every move in that movie and that's the reason why he was watching it several times a day and why I got the hit.