Hi D.,
I am an Occupational Therapist and have worked with young children for many years (I am currently at home with my toddler and infant). The first thing that came to mind when I read your question is that your daughter may have a mild case of Sensory Integration Disorder, primarily Tactile Defensiveness. You have probably never heard of this, as many parents havn't, but basically your daughter is not processing touch input the same way as other people, so she has a hypersensitivity to the way some things feel on her skin. If this were the case, the alley incident could be explained by her fear of rubbing agains the walls. On the other hand, this may not be the problem at all. It is very hard to know if this could be the problem without seeing a child and how it really effects them. In some cases children may have difficulty processing input from the other senses, including hearing, taste, sight, smell and even motion.
If your daughter continues to have similar issues that severely limit her from participating in day to day activities, you may want to mention it to your pediatrician and she could refer you to Early Intervention Services in your area who could possibly help assess the situation better. If it is just that these things annoy her, you might try by exposing her to various textures, ie. walk barefoot in sand or grass, play in a bin of dry rice or past, play with play dough etc. As she gets older she may be able to start to "grow out of" her sensitivities.
I hope this helps!
Good Luck.