Hi Timber,
Welcome to the forum! It sounds like you may have been having a sz. (seizure) during the e.e.g. with the jerking around. This will show up in the e.e.g. and also if this happened when the lights were flashing it will show that you are photosensitive meaning bright light or certain color lights will trigger sz. PTSD can sometimes trigger sz. for a person.

As I have told others have your family Dr. refer you to an Epileptologist and take vitamin B12 1000 mcg. once a day it will help calm the nerves and in some cases it reduces and stops sz. for people. I wish you the best of luck and May God Bless You!

Sue