Public liability is different from professional liability as the person claiming does not need to be the policy holder's client. If a member of the public enters a building and sustains an injury due to negligence by the company occupying the building or the maintenance company, they can sue for damages. The claim will only be successful if the plaintiff can prove that due care was not taken by the policy holder. Due care in the case of slippage will include placement of caution signs, prominently displayed in slippery areas. People can also claim for stress and anxiety. These are normally associated with armed robberies, malfunctioning elevators and a number of stressful situations that may be experienced. Objects falling on to people and causing physical injury is also a common reason to claim. In some rare cases, trespassers can also claim liability, especially if the trespasser is a child. For example, this may occur if a child enters a restricted area and sustains an injury due to negligence of a construction crew.