I've seen some crazy things on the dirt road to Kaena Pt: Once I saw a tourist couple that made it all the way to the washout (from the Makaha side) in a Cadillac convertible. How they got that far I'll never know. Another time there was a motorcycle abandoned in the crevace at the washout. Had to be a lot of alcohol involved in that one.
My hat's off to anyone who bicycles on O'ahu. After I was hit that ended it for me. If I'm on the road there I want as much steel around me as possible... a Sherman tank or Brinks truck come to mind.