I drove them up north to Kohala Ziplines and they paid to have me go along with them! It was awesome! This wasn't my first time zip-lining on the Big Island. A couple years ago I went with some visiting friends and we used another company. The experience was not nearly as good as it was with Kohala Ziplines.
Anyway, the last zipline of the day was a tandem set-up and one of our guides, Tammy, offered to video me from her line as I used the other line. She did an awesome job! See for yourself.