We just heard this said from Police Chief Moose
"the sniper caught like a duck in a noose"
Next line? Poetic justice?
I think it's just a black slang thang -
The story of blacks: The aborigines in Austrailia
http://www.culturelanguage.com.au/aborigines/food_ch26
a native would lurk silently among the reeds, and whenever an unsuspecting duck or other bird came near enough, the noose would be slipped over its head, and never more would it float, or fly, or swim.