With apologies to Ian Fraser whose serious and important question reminded me of this true story. 
 
Two blokes investigating a lake in S.W. Queensland for its' national park potential, are sleeping in the open near the lake.  As bloke A tells the story, he woke during the night to hear a most strange sound.  It was all around him.  Never heard anything like it.  Switched on his torch (flashlight) and the mystery was solved: 
 
    Hundreds of grazing ducks!  (Woodies, I guess.)  The ducks panic and take off in all directions, one shooting straight down inside the sleeping bag of B who until then was still asleep.  The effect of the cold muddy feet and sharp claws of a panicked duck on his naked body was as disconcerting to B as it was amusing to A. 
 
Yes, feeding wild ducks can be a problem! 
 
Syd 
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