I have to say that I misjudge how high I have to lift my foot to land on the step more times than I can mention and end up not only tripping over the step when my foot comes to a dead halt, but I also make a lovely LOUD scraping sound as my shoe drags accross the ridges on the "no slip" surface on the top of the step. I have not landed on my face yet, but come very close many many times. I have also rolled off of my stability ball and had it roll out from under me many times as well.
Katie
Katie