Gravel scares me, even on a mountain bike.

I had a "This can only end in tears" experience last summer.
http://www.youtube.com/watch?v=0QkurL3HPSA
See around 2:30 in this clip if this doesn't sound familiar.
This Bartok the Bat line has been a family favorite for years. Whenever someone gets ready to do something dumb that has a high probability of causing pain and injury, someone in the family usually says this line. Such as stacking two or three chairs to change a light bulb or using the wrong tool for a job.

I was sight seeing with my husband and we had just finished a small hike and were getting back on the mt bikes. It was very hot and we had put our water bottles in our pockets. I forgot to take mine out and noticed it as I was pedaling on asphalt heading towards a gravel road. I reached down to get it out with my right hand but it was in my left pocket and I could not physically remove it so I switched to my left hand. This is the point where that fateful line crossed my mind but I couldn't help myself, I had to keep trying. I got the bottle out and was navigating it towards the holder when I noticed I was just about to reach the gravel. At this point I panicked, squeezed the right brake and you can imagine what happened next. I didn't have gloves on because this was a sight-seeing ride and so I was picking gravel out of my palm and my knee was a bit banged up. I couldn't remember the last time I had fallen on a bike on the road but I came up laughing. I brushed off and rode the 10 miles back to the camp site.

This Saturday I overcame my fear and followed my husband on a packed but thick gravel drive on my road bike. No problems! The only bad part was that we stopped to fill our water bottles and when he handed mine back I found out why he's been complaining about his gloves developing a life of their own. The smell about knocked me over even if the gravel hadn't!

What a blessing that you were at low speed and had a pit crew at hand to help you out. I am sure you more than redeemed your dignity when you picked up and kept going.
I healed up fast and hope you work out your tweaks, bruises and abrasions quickly too. Glad to hear the major equipment is okay as well.