As always Mark, thanks for taking time to answer me. And thanks for explaining "immediate symptoms".

When you write that "A 2 1/2 year old's head is too soft to impart any serious force", do you then mean that it is not possible to get a concussion from a 2½ year old, or do you mean that concussions is possible but not skull fractures etc.?

And should I consider this a concussion or sub-concussive impact? I have a hard time figuering how many G's was transferred but will try to move on.