A man has been rescued while swimming in just his underpants in high seas during Storm Diana.<br /><br />The incident happened in Mount's Bay, Cornwall in southwest England after someone spotted the man and called the RNLI.<br /><br />The footage shows the man getting battered by large waves due to 75mph winds.<br /><br />According to local reports, the man said he "just fancied going for a swim" and he refused help to start with from the coastguard.