Many more thanks!!

For you hopeless romantics... I emailed Andy asking him again what prompted him to ask... and he wrote back:

I was just so worked up by the falls themselves and how awesome it was on the lower area we were at, and you were smiling so big and your eyes were glowing (when we were in the tunnel behind the falls) and I decided then I'd do it back outside right in the elements, and at the moment I did it, we were the only ones on the platform so it was very private-- cause I caught it between the moments when other people were out there too.