I think this task is brilliant. However, my first thoughts on what to do for it ended up in a never ending loop of things that already have information. I was talking about this to my friend the next day and he said, "oh that's easy, just stick some b.s. instructions on like a parking meter". I felt like an idiot after hearing that! Of course, I had been looking for something to convoluted before and completely missed the simple actions. Well, I liked his idea and whipped up a little note for a meter. At first I did try to make instructions on how to use one, but this was harder to make than it sounded. Instead I just made a little do not put your finger in here sign and had it next to the coin slot.
Give it some thought, with out that warning, I wonder how many people broke a nail or jammed their finger?!?!