If it makes you feel better Robyn the same thing happened to me a few weeks ago out with Hubby and the kids. They tear up and down the hills and jump rocks and roots and all I kept thinking was I hope I don't fall and break something. After three miles I was done, luckily the weather got nasty so we had to head back. I was relieved. I like the fire roads and tamer trails to mountain bike. Rock beds and root swamps just cause to much anxiety.
Jody the Mtb wimp.