Has anyone else ever tripped on one of those 18" diameter circular wire hoops that fall into the street or sidewalk that come from lost hubcaps? Its like a jogger snare trap. This happened to me twice in two years. First time, it tripped me so hard, I smashed my head on the concrete and needed 16 stiches above my right eye. Few days ago it happened again however I was lucky to fall in the grass without harm.
Is there anything that can be done about these damned things? I have had some other near incidents with these things as well over the past years.
Note: Some photos not for the squeamish.