Vanilla Bean,

I take gabapentin (Neurontin) to reduce the seizure like symptoms.

There is a stroke called a beauty parlor stroke where putting the head back and resting it over the edge of the shampoo sink can dislodge plaques in the vertebral arteries. The trauma to the head and neck during a concussion could do the same.

I have had some strange experiences. I have heard a loud bang, more of a pow and have had flashes of light.

I bet many have experienced unexplained momentary symptoms.