It really was a resounding thump.
As I tried to evade some heavy smoke rolling off of our campfire, I turned and ran. Straight into a 6X6 cross beam at the shelter house.
I'm not sure exactly how I got onto the ground, although I know I didn't fall hard because the rest of me didn't hurt. My kids said I kind of staggered and half fell, half sat. I just remember being on the ground with my little brother holding onto my shoulders and cradling me from behind.
Yeah, it hurt. And I was dizzy and nauseous. So I let them take me to the emergency room. And the people at the ER were very nice and put me in a wheelchair, then a bed, then a CT scan.
After a couple of hours they sent me home with a diagnosis of mild concussion and some instructions that--thankfully--included rest. I'm glad they included rest because that's really all I've felt up to so far this week.
I think that the next thing on my list is getting reacquainted with my chiropractor. The ER doctor said that the effect on my neck would be similar to a whiplash injury and I'm feeling it today.
The morale of the story: Don't run with your eyes shut, even if they're full of smoke.