Swamp
A tsunami of shrimp crashes into a swamp. Now the swamp is filled with shrimp. They used to live in the ocean, but the tsunami has carried them to their new home in the swamp.
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Your house was right next to the swamp and on this side of your house you had many a tack (たく) there to hang things on. Now, on every tack there is skewered a shrimp. The force of the tsunami drove them into the tacks on the side of your house.