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The mind is a precious object.It is the source of our third eye chakra, it is definitely possible for a massive force in collision to the skull create hallucinations etc.But I would be careful with you either 'seeing energy' or you hallucinating.Have you consulted with your doctor?
It is possible, I have known cases of people after a heavy blow or shock lose a set of skills without organic brain lesions. Is said to be a lag because of the subtle bodies transient due to the impact. Not something common but can happen