Goodness... got such a fright.  All of a sudden there was this almighty noise.  It&#39;s a guy on an Air Boat with a hose sprayer going up and down the river spraying the spreading weed and algae ..... sheesh he evidently must have just idled up to our place and then when he was ready to leave he started that screaming thing up.  Glad we don&#39;t have those things going up and down the river, they are so noisy.