I think phat about has it nailed!

At age 74, I've only encountered auto accidents, never anything on the trail.

I will admit, the recent Oregon court case which basically overturned Oregon's "Good Samaritan" law gives one something to think about. I don't think I'd hesitate, though, if someone needed my help! I'll worry about the consequences later. On the other hand, I won't act beyond the parameters of my training. The case in question involved those with no first aid training at all moving an auto accident victim without first stabilizing his neck/spine.

Of course, according to the Oregon Motor Vehicle code, if we don't stop and "render aid," we're guilty of a felony. 'Tis a puzzlement!