As a child I had a morbid fear of quicksand. I'd probably watched too many Tarzan films*, and PIF's like 'Keep A Grid On It', a warning about the dangers of children dying in grain pits ('drowning without water') didn't help. Come to think of it, as an adult I'm still pretty scared of quicksand AND grain pits, I'm just wise enough to know that if I don't go looking for that sort of danger, it certainly won't coming looking for me.
*There is no such thing as too many Tarzan films.
