(yes, I'm doing them out of order. This is the random-abstract part of my personality showing through. My mother's concrete-sequentialness, though well taught, shall not prevail!!)
Day 28 - A picture of something you're afraid of.
or heights + edges
I guess it comes down to a fear of falling? When I used to have to go out on the catwalk to hang stage lights for the theater, I would get a feeling like all my insides were falling right out through my woohoo (there's a visual for ya!). I still get it a little if I get too close to the edge at a scenic overview or something.