I don't bounce as i did in my youth, that's for sure, and my lack of depth perception (only one eye that works) can get me into trouble in dim light. The restaurant was one of those burger places with booths that you step up into, and -- not seeing the difference in floor level -- I forgot to step down when scrambling out. Then my heel caught the edge of the invisible step, and over I went. Not fun; the bruises hurt for days.