"Crazy Chin" was completely unnecessary.
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Imatwork — 9 years ago(January 28, 2017 08:06 AM)
Not EVERYTHING that exists needs to have an explanation.
Actually, If it's something that started at say, age 7.something triggered it and once you find out what, you have an explanation.
If he's been doing it since he was able to grab anything at 6 months old, then it would just be something he does and no explanation would be needed.
Since it was stated that he didn't used to do that and it appeared later in childhood there would be an explanation for this sudden change so the episode was necessary.