You'd be surprised how often this happens. Several times Ive been met with abuse for trying to warn people - especially with children - that what they're doing is dangerous. Tip tip on holiday in Kernow: 1) the waves are much bigger and stronger than they look 2) learn to spot rip tides 3) follow the fishermen - if fishermen appear on cliffs, gather your stuff and run like hell. The tide comes in very quickly here, and very powerfully. Fishermen know the water and only turn up when the tide is due in. If the tide is already in, and there's nobody fishing - do NOT go in. If the tide is out, and nobody is around - do NOT go in. 4) If there are no surfers/body boarders in the water - do NOT go in. Surfers, like fishermen, know the local waters better than you. 5) if a local tells you what you're doing is dangerous - listen to them: they know the water better than you. 6) if there are no lifeguards and you have your children with you - do NOT go in.