Sometimes, property owners cannot reasonably take care of potential hazards fast enough to protect all visitors to that property. For example, suppose that a spill occurs in one of the back aisles of the grocery store. While employees usually make their way to those aisles several times a day, an employee does not stand in that location all day to wait for potential problems. If a spill occurs, and you slip and fall on it moments later before store staff has had a reasonable opportunity to identify the hazard, the store might not bear liability for that incident.