In the story, my protagonist is walking in a part of town that is not taken care of. My character, at this point in time, is super tired and trips over a clump of grass growing from the sidewalk.
Mary was exhausted, walking the sidewalk to the bus stop. She didn't even like this part of town, the ratty stores, the broken curbs. It looked -- Suddenly something blocked her foot in mid-stride, she lurched and regained her balance. Looking back, she'd tripped over a clump of grass growing through a crack in the sidewalk.
Great, the perfect ending to this day, a faceplant on a filthy sidewalk.
She'd laugh if she weren't so tired.