"Volenti non fit injuria" is Latin for "to the willing, no injury is done". It operates when the claimant either expressly or implicitly consents to the risk of loss or damage. For example, if a regular spectator at an ice hockey match is injured when a player strikes the puck in the ordinary course of play, causing it to fly out of the rink and hit him or her, this is a foreseeable event and regular spectators are assumed to accept that risk of injury when buying a ticket. A slightly more limited defence may arise where the defendant has been given a warning, whether expressly to the plaintiff/claimant or by a public notice, sign or otherwise, that there is a danger of injury. The extent to which defendants can rely on notices to exclude or limit liability varies from country to country. This is an issue of policy as to whether defendants should not only warn of a known danger, but also take active steps to fence the site and take other reasonable precautions to prevent the known danger from befalling those foreseen to be at risk.