good to hear
we found with dd1 that she went more to A&E than the others because of anoxic reflex not because she was injured but because it was hard to tell if she had in fact been knocked unconscious .....we didn't get a diagnosis when she was young as before the internet was so useful and so were pretty much in the dark..the gp used to say well she is fine now (ie you are exaggerating)
it was a great relief to eventually find out it had a name and was harmless and idiosyncratic
consequently I don't really know much about it as although dd1 had some very exciting spectacular episodes they never caused a greater injury than she had already had from being whacked with a baseball bat, hit by the boom on a sailing boat, kicked in the jaw, falling off a bike et c etc
so hope the above is reassuroing if your LO is given this diagnosis if not then I hope it isn't anything serious...it does sound exactly like ras though