The movement of people, birds, and animals all reflect the outcome of the work you are undertaking at that particular moment. Example you are about to start on a work and you drop your keys before entering to the car that work will be delayed or cancelled or more careful planning or preparation is required or got into the car realized you have forgot a specific document you need to go back and get the document that specific task related to the document will be delayed. One should be not be scared of these situations or become superstitious and understand you need more clear preparation and hard work is required.