...... says 'error page not found" , how's your post link work for you ??
Anyway , the Swans did not attack the kayaker , they had nothing to do with his drowning . He feel out of his kayak w/o a PFD on and drowned ... very sad , very typical .
Yes , a PFD is always a good idea , they help you keep your head above water as opposed to under it , definately can make all the difference in the world when it comes down to it .