Lego Hell
A friend of mine has the loveliest daughter who used to enjoy playing with plastic dinosaurs, which quickly became scattered all over the floor, when they came to visit.
A harmless enough pastime obviously so long as all the toys were picked up a put away carefully, but an impossible dream for anyone who remembers having young children.
And walking around in your bare feet was simply asking for trouble, as I recall, because these dinosaurs had exactly the same hellish effect as dreaded pieces of Lego.
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