And you worry about GWS...

Looks like Florida has it's own Landlord, and more to worry about than face-eating zombies! 

http://www.sportfishingmag.com/blogs/top-shots/killer-manatee-nearly-drowns-angler

I used to see them on the Saint Johns Inland Waterway.    they are not little things by any stretch.  most of the time they are pretty docile.  I have never heard of one doing this, he must of really startled it.