Pretty significant to the head. but as you mentioned, may have fell, slipped and hit the back of my head. that really hurt but i didn't lose consciousness. i feel okay. if someone were around and saying, hey, look, do you have a headache? is that headache worsening? the person appears confused, they are slurring speech, becoming nauseated or even vomiting. things like that. those would all be indicators that something is happening, that you obviously should get checked out quickly. but again, being alone, not being certain just how significant a blow to the head did i -- did i just take just g...