A somewhat stern and unyielding (dammit!) concrete floor just knocked some sense into my head. Does anyone here know anything about potential mild concussion? I AM NOT going to the ER, but should I be worried..? →[More:]

1. No alcohol or drugs were involved!! LOL. Although I sure could use a beer now, though alas I shan't.

2. I have naturally low blood pressure and often experience postural hypotension. I've had a TON of physical exertion/exercise and stress lately, and after a long bike ride today I carried some things into the basement. I did a tai chi stretch in which you lean backwards, then:

3. Nada. Blackout. Nothing else until I was woken up by:

4. ...the sounds of the back of my head hitting the concrete and my glasses skittering across the floor.

SO:

5. My scalp is bleeding, but I don't seem to have any gashes that would require stitches. A goose egg, yeah, but not even a big one.

6. My jaw aches from the shock/reverberations of my skull bouncing on the floor like a dropped bowling ball, but no big deal.

7. I'm a little tired and punchy/irritable, but not too much.

8. I feel oddly refreshed (or, as a friend put it, "rebooted".) Heh!

9. My ass doesn't hurt, but I feel a bit like one.

Should I have someone wake me up a few hours after I go to sleep tonight and ask me my name, the date, who the president is, etc.? That's all they used to prescribe for this type of thing. I'll start practicing up now: Shane, July 4th, Nixon...

Kidding.

Thanks.