I was in a car with my friends when a drunk drive hit us head on I was 15yo it put me in a coma for a very long time broke my left arm in half gave me a head injury I had to relearn how to walk talk everything all over again but now I am 50yo and I was wanting to know with a head injury if you laugh real hard and it blacks you out could that be from my head injury from 35 years ago? and if it was not For God up above I would not be here today I know back when this happen there was no seat belt law and the car i was riding in had no seat belts in it and my left arm got snap in half when I put my left hand up to shield my eyes n it got knocked back behind my back from the impact of being hit head on.