update:
Tandem jump #2 went well.
I barely felt any falling this time, even though the tandem guy got fancy and had us exit by back-flipping.
I was positive I'd freak out but when the time came it was fun.
Now I'm actually considering starting AFF. We'll see. It still sounds scary, but it's not the unthinkable concept it was when I first heard of it several weeks ago.