Unpredictable

Something strange that happened recently: in my LA grocery store of choice, I was walking down the main aisle (with the checkout lines on one side and the openings to all the aisles on the other side) when I slipped on a water spill, apparently so recent that there weren't even caution signs out. I fell forward on one knee and caught myself on my hands - no blood, but certainly a bruise and a little bit of pain. It was about 5:30 on a weeknight, so it was crowded, and I saw several people look at me as I fell, but none of them paused as they walked or said anything as I got up. The people coming toward me just looked at the floor where I slipped and walked around the area. I've been having trouble deciding since then whether this is reflective of disinterest in other people - no one cared to say anything - or awkwardness about interaction with strangers - people might have said something but weren't sure what the etiquette was when I got up and was fine. Would I have stopped?