1st, I love your music & vids!! I doubt you need ideas, but this has stuck with me and you could probably do it better than anyone.
Anyway, as a Home Improvement Artist in Denver, CO., I frequently drive with ladders strapped to the top of my truck, and, listening to the rungs whistling and the straps humming, I always thought it would be awesome to devise a way to play them while driving.
I have played with it a little by varying speed and strap tautness, but I know you could take it to a whole new level!
Here's hoping!!