Has that ever happened on your motorcycle? I ride as well, and carrying my ego c-twist with me is not that much fun, so I ended up carrying two 650Mah batteries for when I ride, which I do not like to do. Plus the fact that it has some protection for the tank is pretty nice.
Not yet, but I have lost a cell phone, cigarettes, beer, and whole array of other things. I don't ride with bags, fairings, or any "dresser" amenities either. If it can't be carried on my person or tied to the sissy bar, it don't need to go.
I just want the piece of mind in case. I usually tuck everything nicely in the inside vest pocket, but a long run up the freeway, and I could drop it. This also means I don't have to stop to smoke, I can just reach in clicky click on my button and have a drag while cruising the open road. Obviously, not in traffic, or other unsafe areas.