Thanks for the insight Mark. I did not see stars/experience a bell ring sensation. I did feel as if I hit my nose but that could also be due to allergies. In terms of logically deducing if this could cause concussion, it takes running into a wall at 20 mph to do so right? So I am confused as to why I am having concussion symptoms from subjecting my brain to 1/4 or less of that force. thanks again.