Thank you! Just the nudge I needed, I would not have discovered that on my own. I always set up and the last thing I do is turn on the bike as I pedal out. Interesting that is actually solves the issue.
Anybody know how to disable shake to undo in mission control? I know I can disable it for the iPhone. But I do use it in mail. Comes up in mission control when on a bumpy ride and does not let me see the readout. Or maybe there some secret screen lock setting, let the iPhone know I am not...