I'm not a MTB'er - but us road riders have demons too.... I had great satisfaction riding past the spot on a previous MS-Tour where I had a bad asthma attack. Didn't have to go to the hospital, but they did take my bike away from me..."baby, you're done for today".

So knowing the place was coming up, I had to make it past that place. Let out a Yippee! as I passed, which confused the riders around me.

Get out there, on the trail again.

Hope your friend is doing better. But she may never remember the ride, even if she goes on the trail again.